Decimal Converter – Decimal to Square Feet, Acre, Katha & Other Indian Land Units

Written and fact-checked by Aadil Saif. Arithmetic independently re-verified · Last updated September 2026

Part of the India Land Unit Converter series.

Two questions had to be answered before any arithmetic was worth printing: which documents use the word decimal, and what they mean by it. The answer to the first is four instruments, a departmental report and two High Court orders. The answer to the second turned out to be the reason this page exists. Six of the searches came back empty, and all six are listed at the end rather than papered over, including one that surprised us, because West Bengal's own rules never use the word at all. The figures were held as exact fractions and rounded once, at printing. The checking script behind this page recomputes the notation table in both directions, confirms the tenfold trap really is a factor of ten on every row, and re-derives the West Bengal bracket errors from the rule text.

The Answer, First

1 decimal = 435.6 square feet, exactly one-hundredth of an acre. In metric, 40.468564224 square metres, an exact figure, not a rounding. In square yards, 48.4.

Decimals	Square feet	Square metres	Acres	As an acre figure
1	435.6	40.468564	0.01	Ac.0.010
2	871.2	80.937128	0.02	Ac.0.020
3	1,306.8	121.405693	0.03	Ac.0.030
5	2,178	202.342821	0.05	Ac.0.050
10	4,356	404.685642	0.1	Ac.0.100
20	8,712	809.371284	0.2	Ac.0.200
25	10,890	1,011.714106	0.25	Ac.0.250
50	21,780	2,023.428211	0.5	Ac.0.500
75	32,670	3,035.142317	0.75	Ac.0.750
100	43,560	4,046.856422	1	Ac.1.000

Popular Decimal Conversions

Decimal	Square Feet	Square Meter	Acre	Katha (West Bengal)	Chatak
1	435.6	40.468564224	0.01	0.605	9.68
2	871.2	80.937128448	0.02	1.21	19.36
3	1,306.8	121.405692672	0.03	1.815	29.04
5	2,178	202.34282112	0.05	3.025	48.4
10	4,356	404.68564224	0.1	6.05	96.8
20	8,712	809.37128448	0.2	12.1	193.6
50	21,780	2,023.4282112	0.5	30.25	484
100	43,560	4,046.8564224	1	60.5	968
200	87,120	8,093.7128448	2	121	1,936
500	217,800	20,234.282112	5	302.5	4,840
1,000	435,600	40,468.564224	10	605	9,680

Read the last column. That is the same area as your record writes it, and it is the whole point of this unit: the decimal is the acre's second decimal place. A record reading 0.35 acre is 35 decimals. There is no conversion between them. They are one number written two ways.

The decimal is the working small unit of Jharkhand, West Bengal, Odisha and Assam, and it is what the records in those states are kept in: Bhulekh, Banglarbhumi, JharBhoomi and Dharitree all show acres. If your document reads Ac.0.100, read this before you act on it. It is ten decimals, not a hundred.

Convert The answer, first · To square feet and square metres · To acre, hectare and the metric units · To cottah, chatak, katha, bigha, lessa and guntha · To square inch, centimetre, kilometre and mile

Understand The decimal is a decimal place · How to read "Ac.0.100 decimals" · What West Bengal's rules say instead · The smallest measurable piece of land · The same area under another name · Three mistakes · If your document and your neighbour disagree

Check FAQ · Sources and method

Convert to a specific unit: Acre · Ankanam · Ares · Bigha · Biswa · Biswa Kacha · Cent · Chatak · Dhur · Dismil · Gaj · Gajam · Ground · Guntha · Hectare · Kanal · Katha · Killa · Lessa · Marla · Murabba · Nali · Perch · Pura · Square Centimeter · Square Feet · Square Inch · Square Karam · Square Kilometer · Square Meter · Square Mile · Square Yard

Every one of the other thirty-two units has a section on this page. Where two units are the same area their table would be identical, so the second section points at the first rather than repeating it.

Decimal to Other Units – Quick Conversion Formula

Every factor is a decimal's own size, 435.6 square feet, divided by the target unit's. To check any row by hand, take that number, divide, and compare.

Each one comes from a single anchor, the acre at 43,560 square feet, by exact fraction arithmetic. Where a factor recurs, the formula gives the fraction rather than a rounded decimal, because a rounded factor is a wrong instruction rather than an approximate one: the fraction is what has to be carried wherever the arithmetic must close.

Conversion	Formula	Status
Decimal to Acre	Decimal × 0.01	Exact
Decimal to Ankanam	Decimal × 6.05	Exact · Ankanam is regional. This row is the Standard; also 12.1
Decimal to Ares	Decimal × 0.40468564224	Exact
Decimal to Bigha	Decimal × 0.03025	Exact · Bigha is regional. This row is the West Bengal / Assam / Jharkhand; also 0.016, 0.048, 0.064 and 5 more
Decimal to Biswa	Decimal × 0.32	Exact · Biswa is regional. This row is the UP / Rajasthan pucca; also 0.5, 0.96, 1
Decimal to Biswa Kacha	Decimal × 0.96	Exact · Biswa Kacha is regional. This row is the Punjab / Haryana revenue; also 0.5
Decimal to Cent	Decimal × 1	Exact
Decimal to Chatak	Decimal × 9.68	Exact
Decimal to Dhur	Decimal × 6.4	Exact · Dhur is regional. This row is the Bihar / Jharkhand (Patna chain); also 121
Decimal to Dismil	Decimal × 1	Exact
Decimal to Gaj	Decimal × 48.4	Exact
Decimal to Gajam	Decimal × 48.4	Exact
Decimal to Ground	Decimal × 0.1815	Exact
Decimal to Guntha	Decimal × 0.4	Exact
Decimal to Hectare	Decimal × 0.0040468564224	Exact
Decimal to Kanal	Decimal × 0.08	Exact · Kanal is regional. This row is the Standard (66-inch karam); also 0.0968, 0.1054, 0.119506
Decimal to Katha	Decimal × 0.605	Exact · Katha is regional. This row is the West Bengal / Jharkhand; also 0.32, 0.15125, 0.25 and 2 more
Decimal to Killa	Decimal × 0.01	Exact
Decimal to Lessa	Decimal × 3.025	Exact
Decimal to Marla	Decimal × 1.6	Exact · Marla is regional. This row is the Standard (66-inch karam); also 1.936, 2.108008, 2.390123 and 1 more
Decimal to Murabba	Decimal × 0.0004	Exact · Murabba is regional. This row is the Punjab canal colony; also 0.00064
Decimal to Nali	Decimal × 121/600	Recurring
Decimal to Perch	Decimal × 1.6	Exact
Decimal to Pura	Decimal × 0.0075625	Exact
Decimal to Square Centimeter	Decimal × 404,685.64224	Exact
Decimal to Square Feet	Decimal × 435.6	Exact
Decimal to Square Inch	Decimal × 62,726.4	Exact
Decimal to Square Karam	Decimal × 14.4	Exact · Square Karam is regional. This row is the Standard (66-inch karam); also 17.424, 18.972068, 21.511111
Decimal to Square Kilometer	Decimal × 0.000040468564224	Exact
Decimal to Square Meter	Decimal × 40.468564224	Exact
Decimal to Square Mile	Decimal × 0.000015625	Exact
Decimal to Square Yard	Decimal × 48.4	Exact

The Same Area Under Another Name

If you have arrived from outside the east: yes, a decimal, a cent and a dismil are the same area. All are one-hundredth of an acre, so all are 435.6 square feet. Any converter giving different numbers for them is wrong.

What differs is the state, the instrument, the record system and the units sitting alongside, enough that each word has its own page here.

The word	Where it is the working unit	Its own page	The instrument that uses it
Decimal	Jharkhand, West Bengal, Odisha, Assam	this page	Chota Nagpur Tenancy Rules 1959, r. 26 and Form No. 7
Cent	Kerala, Tamil Nadu	Cent Converter	Kerala Land Assignment Rules 1964, rr. 6 and 14
Dismil	Bihar, eastern Uttar Pradesh	Dismil Converter	Bihar Revenue Glossary
Shatak, শতক	Bengali speech, alongside decimal	covered here	None found, no instrument located using the word

The Bengali shatak (শতক, also written satak or shotangsho) is this same unit named in Bengali, and it is covered on this page rather than given one of its own. We could not locate any instrument that uses the word, not the West Bengal Land Reforms Rules, not the state's Land and Land Reforms Manual. It is a spoken word for a written thing, which, as the rest of this page argues, is exactly what the decimal is too.

Decimal to Square Feet and Square Metres

Two multipliers, both exact: 435.6 for square feet, 40.468564224 for square metres. Nothing in this section is approximated. The second column below is the figure your own record shows, so you can find your holding in the table without converting anything first.

Decimals	On the record	Square feet	Square metres	Cottahs
1	Ac.0.010	435.6	40.4686	0.605
2	Ac.0.020	871.2	80.9371	1.21
3	Ac.0.030	1,306.8	121.4057	1.815
5	Ac.0.050	2,178	202.3428	3.025
7	Ac.0.070	3,049.2	283.2799	4.235
10	Ac.0.100	4,356	404.6856	6.05
15	Ac.0.150	6,534	607.0285	9.075
20	Ac.0.200	8,712	809.3713	12.1
25	Ac.0.250	10,890	1,011.7141	15.125
33	Ac.0.330	14,374.8	1,335.4626	19.965
50	Ac.0.500	21,780	2,023.4282	30.25
66	Ac.0.660	28,749.6	2,670.9252	39.93
75	Ac.0.750	32,670	3,035.1423	45.375
100	Ac.1.000	43,560	4,046.8564	60.5
133	Ac.1.330	57,934.8	5,382.319	80.465
150	Ac.1.500	65,340	6,070.2846	90.75
200	Ac.2.000	87,120	8,093.7128	121
250	Ac.2.500	108,900	10,117.1411	151.25
300	Ac.3.000	130,680	12,140.5693	181.5
500	Ac.5.000	217,800	20,234.2821	302.5
1,000	Ac.10.000	435,600	40,468.5642	605

Working from a builder's or broker's square-foot figure

Divide by 435.6. The division rarely comes out: 1,000 square feet is 2.295684… decimals and the digits never stop. Carry the fraction to the end of your calculation and round once, at the point you write a number down. The cottah column is there because in Kolkata and on the Ranchi side the quoted figure will often be in cottahs rather than either of the other two.

Square feet	Decimals	Cottahs	Square metres
435.6	1	0.605	40.4686
720	1.652893	1	66.8902
1,000	2.295684	1.3889	92.903
1,440	3.305785	2	133.7804
2,000	4.591368	2.7778	185.8061
2,880	6.61157	4	267.5608
3,600	8.264463	5	334.4509
4,356	10	6.05	404.6856
7,200	16.528926	10	668.9019
14,400	33.057851	20	1,337.8038
21,780	50	30.25	2,023.4282
43,560	100	60.5	4,046.8564

Worth carrying in your head: ten decimals is 4,356 square feet and reads Ac.0.100 on a record; a hundred is an acre; and a Kolkata cottah is a fraction over one and a half decimals, which is the one ratio in this whole page that people habitually round and should not.

The Decimal Is a Decimal Place

Every other unit in this series is a measure with a history. The bigha was a field. The katha was a share of one. The guntha is a square of thirty-three feet. Each had to be defined, and each has a size someone once fixed.

The decimal is not like that, and the difference explains almost everything readers find confusing about it.

"Decimal" names the decimal place of an acre. An area recorded as 0.35 acre carries its size in two decimal places, and in eastern India the word for those places is the word for what they measure. A hundredth of an acre was never chosen as a convenient parcel size; it is simply what two decimal places of an acre give you.

Four documents show this. None says it in those words, and none of them has to. It falls out of what each of them requires. (How the word made that journey from notation to unit name we cannot tell you: we found no document recording the transition, and the argument below does not rest on one. What follows is the result, not the history.)

One: the rule that requires the notation. The Chota Nagpur Tenancy Rules, 1959 govern applications under the Chota Nagpur Tenancy Act, 1908 across what is now Jharkhand. Rule 26's Explanation provides:

"The area must be given in acres and decimals when these are known, otherwise, in the measures locally prevalent."

Read the phrase as written. Not "in acres or in decimals", two alternative units. "In acres and decimals": one figure, written in acres, carried to its decimal places.

Two: the form that ranks it against real unit chains. Form No. 7 under the same Rules, the application for enhancement of rent, prints this column heading:

"Area in (1) acres and decimals or (2) bighas, kathas and dhurs or (3) local measure."

Option two is a chain of three units. Option three is whatever the village uses. Option one is neither: it is a notation, and the Rules put it first. A 1959 state instrument is telling applicants that the preferred way to state an area is as a decimal acre, with the traditional chain as the fallback. That is the reverse of the priority anyone would guess from how land is actually talked about in Jharkhand.

Three: the states whose rules never use the word at all. In West Bengal, where decimal and shatak are the everyday words for land, the West Bengal Land Reforms Rules, 1965 do not contain the word "decimal" anywhere. Neither does the Board of Revenue's Land and Land Reforms Manual. What the Rules use is acres, with hectares in brackets, and cottahs. Form 8A prints a blank that reads:

"measuring........acre (....hectare) more or less"

There is no blank for decimals on that form, and there does not need to be. The decimals are what you write after the point in the acre blank.

Four: the central document that defines it by division rather than by size. The Department of Land Resources, in the DILRMP guidelines, calls it "1 decimal (1/100th part of an acre)". An evaluation of Bihar's land records, published on a Government of India domain, puts it the same way in a footnote: "One decimal of land is equal to 435.6 square feet or 0.01 acres." Both define it as a fraction of the acre. Neither defines it as an area in its own right, because there is nothing to define.

What follows from this, practically

It is exactly one-hundredth of an acre, never approximately. Unlike the bigha, the katha or the biswa, this unit cannot vary by district, because it is a property of decimal notation rather than of local custom. Any source offering you a regional decimal is confused.
No law defines it, and none needs to. We searched for an instrument stating the decimal's size as such and found none. That is not a gap in the law but a consequence of what the word means.
It exists only where the record is kept in acres. Jharkhand, West Bengal, Odisha, Assam, Bihar and eastern Uttar Pradesh keep acres, and all of them say decimal or dismil. Kerala and Tamil Nadu keep hectares and ares, and there the same area is called a cent, a market word with no anchor in the record at all. The word follows the notation.
When a record goes metric, the decimal loses its footing. A holding restated in hectares has no decimal place of an acre to point at. The number survives as a conversion; the word stops describing anything on the page.

One caution, restated because it matters. No instrument says "the decimal is a decimal place" in terms. This is what the four documents show when read together, and it is offered as a reading of them rather than as a quotation from any one. What is quotable is each document above, and each is quoted here in full.

How to Read "Ac.0.100 decimals"

Eastern records and eastern court orders write areas in a compressed form that is easy to misread by a factor of ten, and the misreading always goes the same way, against the smaller party.

Here is the form, from the Orissa High Court in Kulamani Mishra v. State of Orissa, decided 18 January 2018. The judgment recites a purchase of "an area of Ac.0.100 decimals", and a later sale of "an area of Ac.0.050 decimals out of the said purchased land".

Read quickly, "Ac.0.100 decimals" looks like a hundred decimals, a full acre. It is a tenth of one.

The same judgment settles this itself. Elsewhere it describes land "measuring Ac.1.000 in plot no.647", and refers to "100 decimals out of… Ac.1.000 land". So within this one judgment, Ac.1.000 is one acre and one acre is a hundred decimals, which makes Ac.0.100 ten decimals, 4,356 square feet, and Ac.0.050 five decimals, 2,178 square feet.

Written on the record	Acres	Decimals	Square feet	Misread as	Which would be
Ac.0.010	0.01	1	435.6	10 decimals	4,356 sq ft
Ac.0.025	0.025	2.5	1,089	25 decimals	10,890 sq ft
Ac.0.050	0.05	5	2,178	50 decimals	21,780 sq ft
Ac.0.100	0.1	10	4,356	100 decimals	43,560 sq ft
Ac.0.250	0.25	25	10,890	250 decimals	108,900 sq ft
Ac.0.500	0.5	50	21,780	500 decimals	217,800 sq ft
Ac.0.750	0.75	75	32,670	750 decimals	326,700 sq ft

The two right-hand columns are the mistake. On the fourth row a reader who takes the digits as a decimal count turns 4,356 square feet into 43,560, the difference between a house plot and an acre of farmland.

Why the notation reads that way

The three digits after the point are thousandths of an acre, printed to three places because that is the precision the survey carried. Two of those digits are the decimals; the third is a further subdivision of one. So the reading rule is simply:

Move the point two places right. That is your decimals.

Ac.0.100 → 10.0 decimals. Ac.2.365 → 236.5 decimals. Ac.1.000 → 100 decimals.

The word "decimals" trailing the figure is a label for the notation, not a count of anything. It is doing the same job as writing "sq ft" after a number, and a reader who treats it as the unit of the digits immediately before it gets the wrong answer every time.

What we are not claiming. We found no rule prescribing this notation, and we are reading one judgment's usage rather than an instrument. What that judgment establishes is that this is how at least one High Court writes eastern areas, and how the figures inside it are meant to be read, because it reads them itself.

What West Bengal's Rules Say Instead

The absence of the word "decimal" from West Bengal's own rules is worth one more look, because those rules do something else that a reader converting land in Bengal should know about.

The West Bengal Land Reforms Rules, 1965 state their limits in acres and cottahs, and gloss each with a metric figure in brackets. Rule 20A(3) sets a settlement floor and ceiling: "minimum—one-third of an acre (0.1349 hectare)" and "maximum—such area as… does not exceed 2 acres (0.8094 hectare)". Elsewhere the same sub-rule caps another class of settlement at "5 cottahs (.0335 hectare)".

Set those brackets against their exact values:

Rule	Extent as written	Metric figure as printed	Exact value	Error
r.20A(3)(a)	one-third of an acre	0.1349 hectare	0.13489521 hectare	+0.0035%
r.20A(3)(b)	2 acres	0.8094 hectare	0.80937128 hectare	+0.0035%
r.20A(3)	5 cottahs	.0335 hectare	0.03344509 hectare	+0.1642%

The two acre brackets are right to three and a half thousandths of one per cent. The cottah bracket is out by 0.1642%, forty-six times worse than the other two in the same sub-rule. Five cottahs is 3,600 square feet, which is 0.03344509 hectare, and the rule prints .0335.

That is a small error on a small area, and we are not suggesting anyone has been harmed by it. It is worth knowing for one reason: it tells you which figure in a bracketed pair was computed carefully. The imperial extent is the operative one and the bracket is the gloss. The same conclusion Kerala's own rules force from a much larger discrepancy, arrived at here independently and from a different rule-set.

In decimals, for the record: one-third of an acre is 33.3333 decimals, 2 acres is 200, and 5 cottahs is 8.264463.

The Smallest Measurable Piece of Land in India

The most-quoted government sentence about this unit comes from the Department of Land Resources, in the guidelines for the Digital India Land Records Modernisation Programme, at section 5.3.1:

"In 1:3960 scale, the smallest piece of land that can be measured is 1 decimal (1/100th part of an acre) i.e. 435.6 sq. feet."

It circulates almost everywhere with the first three words removed. Without them it reads as a national rule. Indian land cannot be measured more finely than 435.6 square feet. With them it says something narrower, and more useful.

1:3960 is a map scale. It is the classic Indian cadastral scale of sixteen inches to the mile (63,360 inches in a mile, divided by 16, is 3,960), and the surrounding paragraph is about digitising paper cadastral maps. The sentence is about what can be drawn on a sheet and read back off it. It is not about what a surveyor can measure on the ground, and not about what a record can hold.

Work out what that means physically and the sentence explains itself. One decimal is a square 20.871 feet on a side. Drawn at 1:3960, that square is 0.063246 inch across, about 1.6 millimetres. A millimetre and a half is roughly the smallest square a draughtsman can draw with a pen and a scale rule and expect a reader to measure again later. It is the resolution of the drawing, and this unit sits at it because the same imperial system produced both the scale and the unit.

That distinction matters if a boundary is in dispute. Someone telling you the law will not recognise a difference smaller than a decimal is quoting a sentence about paper. What the record can hold is far finer. One square metre in every state this series was able to verify, which is about a fortieth of a decimal.

What we are not claiming. We found no instrument making this sentence binding on anyone. It appears in programme guidelines, not in a statute or a rule, and we found no judgment applying it. It describes practice; it does not create a right. Anyone telling you otherwise, in either direction, is going beyond the document.

To Acre, Hectare and the Metric Units

Only the acre column here is tidy, and for the reason this whole page turns on: the decimal is a hundredth of an acre by construction, not by measurement. The cottah and bigha columns are the ones an eastern holder is usually asked for.

Decimals	Acres	Cottahs	Bengal bighas	Hectares	Square metres
1	0.01	0.605	0.0303	0.004047	40.47
5	0.05	3.025	0.1513	0.020234	202.34
10	0.1	6.05	0.3025	0.040469	404.69
20	0.2	12.1	0.605	0.080937	809.37
25	0.25	15.125	0.7563	0.101171	1,011.71
33	0.33	19.965	0.9983	0.133546	1,335.46
50	0.5	30.25	1.5125	0.202343	2,023.43
75	0.75	45.375	2.2688	0.303514	3,035.14
100	1	60.5	3.025	0.404686	4,046.86
150	1.5	90.75	4.5375	0.607028	6,070.28
200	2	121	6.05	0.809371	8,093.71
247	2.47	149.435	7.4718	0.999574	9,995.74
500	5	302.5	15.125	2.023428	20,234.28
1,000	10	605	30.25	4.046856	40,468.56

The 247-decimal row is there because 247 decimals is the closest whole number to a hectare, 0.999574 of one. A hectare is 247.1054 decimals.

Going the other way, which is what you need when a record has been restated in metric: multiply hectares by 247.1054, ares by 2.471054, or square metres by 0.0247105381. A record reading 0.0405 hectare is 10.008 decimals; one reading 4 ares is 9.884.

To Cottah, Chatak, Katha, Bigha, Lessa and Guntha

These are the conversions that go wrong, because your record gives an area in decimals and your neighbour gives the same area in cottahs, and the ratio between them is not a round number.

Unit	Square feet	1 decimal =	1 unit = decimals	What stands behind the size
Cottah / katha, West Bengal, Kolkata, Ranchi side of Jharkhand	720	0.605	1.652893	Observed; Supreme Court records kathas and chataks at Ranchi
Chatak, West Bengal, Jharkhand, Barak Valley	45	9.68	0.103306	Observed, 16 chataks to the cottah
Bigha, West Bengal and Assam	14,400	0.03025	33.057851	Observed
Katha, Assam, Brahmaputra Valley	2,880	0.15125	6.61157	Observed
Lessa, Assam	144	3.025	0.330579	Observed
Guntha / gunth, Odisha, Karnataka, Maharashtra	1,089	0.4	2.5	Observed
Katha, Patna and most of Bihar	1,361.25	0.32	3.125	Observed, for readers whose document crosses the border
Dhur, Bihar and Jharkhand	68.0625	6.4	0.15625	Observed

Three worth committing to memory if you hold land in the east:

A Kolkata cottah is 1.652893 decimals. There is no clean relationship: the cottah is 720 square feet, the decimal 435.6, and 720 ÷ 435.6 does not resolve. The same cottah is used on the Ranchi side of Jharkhand.
A Bengal bigha is 33.057851 decimals: twenty cottahs, and just as untidy.
An Odisha guntha is exactly 2.5 decimals, one of the very few clean ratios on this page, because the guntha is a fortieth of an acre and the decimal a hundredth.

Assam runs on a different chain again: 6.61157 decimals to the katha, and a lessa is about a third of a decimal. Every regional katha value is set out with its attestation elsewhere; this page gives only the two rows an eastern reader needs.

To Square Inch, Square Centimetre, Square Kilometre and Square Mile

Every figure in this table terminates. That follows from the square foot being exactly 0.09290304 square metre; multiply a terminating decimal by a terminating decimal and the result terminates. The acre column is given alongside because an eastern record states acres, and these units are more often wanted per acre than per decimal.

Unit	1 decimal =	1 acre =
Square inch	62,726.4	6,272,640
Square centimetre	404,685.64224	40,468,564.224
Square kilometre	0.000040468564224	0.0040468564224
Square mile	0.000015625	0.0015625

Three Mistakes That Change the Answer

1. Reading the digits after the point as a decimal count. Ac.0.100 is ten decimals, not a hundred, 4,356 square feet, not 43,560. This is the tenfold error, it appears in real court records, and it is set out in full above. Move the point two places right.

2. Calling a cottah one and a half decimals. It is 1.652893. On one cottah the shortcut loses 66.6 square feet. On a Kolkata bigha of twenty cottahs it loses 1,332 square feet, nearly two cottahs, on a plot where the cottah is the unit the price is set in.

3. Treating the decimal as a regional unit. It is not. The bigha varies by district, the katha varies by district, the biswa varies by state. This does not, and cannot, because it is a property of decimal notation rather than local custom. If a source offers you an "Odisha decimal" different from a "Bengal decimal", stop reading it.

If Your Document and Your Neighbour Disagree

Use 435.6 square feet, and 40.468564224 square metres. There is no regional variant and no second opinion. The decimal is one-hundredth of an acre; the acre is exactly 43,560 square feet; the foot is exactly 0.3048 metre.

When the disagreement is about the notation, the record settles it. Ask which figure is the acre figure. Everything after the point is decimals, two places to the right, and if the parties cannot agree on that, the plot area in square feet is the thing to compute and compare, because it is the same number under every reading.

When someone cites the "smallest measurable piece of land" at you, ask for the sentence. It begins "In 1:3960 scale". It is about what a map can show, not what a record can hold, and it does not stop a smaller area from being recorded.

And if a document uses a different word (cent, dismil, shatak) the area is already identical. There is nothing to convert. What changes with the word is the paperwork around it, which is what the Cent and Dismil pages are for.

Frequently Asked Questions

How many square feet is 1 decimal? 435.6 square feet. In metric, 40.468564224 square metres exactly. In square yards, 48.4.

How many decimals are in an acre? Exactly 100: and that is a fact about notation rather than about measurement. Two decimal places of an acre give you a hundred parts, so the decimal is one of them by construction. It cannot be otherwise, and it cannot vary by district.

What does "Ac.0.100 decimals" on my record mean? Ten decimals: 4,356 square feet, a tenth of an acre. Not a hundred decimals. Move the point two places to the right to get your decimal count. The Orissa High Court writes areas this way and reads them this way itself; the working is above.

How many decimals in a katha, a cottah, a bigha or a lessa? A Kolkata or Ranchi cottah is 1.652893 decimals. A Bengal or Assam bigha is 33.057851. An Assam katha is 6.61157 and a lessa is 0.330579. A Patna katha, if your document crosses into Bihar, is 3.125. An Odisha guntha is exactly 2.5. The full table with attestations is above.

Is decimal the same as dismil, cent or shatak? Yes: the same area under four regional names, all one-hundredth of an acre. What changes is the state, the instruments and the record system. The Cent page covers Kerala and Tamil Nadu, the Dismil page covers Bihar and eastern Uttar Pradesh, and shatak is the Bengali word for what this page describes.

Does any law actually define the decimal? We could not find one, and on the argument this page makes there is nothing for a law to define. The Chota Nagpur Tenancy Rules require areas to be given "in acres and decimals" without saying how large a decimal is. The West Bengal Land Reforms Rules do not use the word at all. The DILRMP guidelines and a Bihar departmental report both describe it as one-hundredth of an acre, a division, not a measurement.

What is the "smallest measurable piece of land" claim, and does it bind anyone? It is one sentence in the DILRMP guidelines, and it begins "In 1:3960 scale". It describes what can be drawn and read off a cadastral map at sixteen inches to the mile, where a decimal is a square about 1.6 millimetres across. We found no instrument making it binding and no judgment applying it. Land records in the states we could check go down to a single square metre.

Which states use the decimal, and what will my portal show? Jharkhand, West Bengal, Odisha and Assam principally; Bihar and eastern Uttar Pradesh say dismil. JharBhoomi, Banglarbhumi, Bhulekh and Dharitree all present areas in acres, so what you will see is an acre figure, and the decimals are the digits after its point.

Sources and Method

What each figure rests on

Statement	Source
1 decimal = 1/100 acre = 435.6 sq ft = 40.468564224 m²	Definitional: the acre of 43,560 sq ft and the international foot of 0.3048 m
"The area must be given in acres and decimals when these are known, otherwise, in the measures locally prevalent"	Chota Nagpur Tenancy Rules, 1959, r. 26, Explanation
"Area in (1) acres and decimals or (2) bighas, kathas and dhurs or (3) local measure"	Chota Nagpur Tenancy Rules, 1959, Form No. 7, column 7
"decimal" absent from West Bengal's rules and manual	West Bengal Land Reforms Rules, 1965; West Bengal Land and Land Reforms Manual, Board of Revenue, searched, no occurrence
"minimum—one-third of an acre (0.1349 hectare)"; "2 acres (0.8094 hectare)"; "5 cottahs (.0335 hectare)"	West Bengal Land Reforms Rules, 1965, r. 20A(3)
"measuring........acre (....hectare) more or less"	West Bengal Land Reforms Rules, 1965, Form 8A
"In 1:3960 scale, the smallest piece of land that can be measured is 1 decimal (1/100th part of an acre) i.e. 435.6 sq. feet"	DILRMP Guidelines, Technical Manuals and MIS, DoLR, §5.3.1
"One decimal of land is equal to 435.6 square feet or 0.01 acres"	Evaluation of Quality of Land Records: Bihar, IIHS, draft for discussion, on a Government of India domain, footnote 2
"Ac.0.100 decimals"; "100 decimals out of…Ac.1.000 land"	Orissa High Court, Kulamani Mishra v. State of Orissa, 18 January 2018
"7 Kathas comprising 15 decimals"	Jharkhand High Court, Dhananjay Rana v. State of Jharkhand, 27 February 2017, see the Katha page
Cottah, chatak, katha, bigha, lessa sizes	Their own pages here

What we looked for and did not find

Any instrument defining the decimal as an area in its own right. Four documents describe it as a fraction of the acre; none gives it a size of its own.
Any West Bengal or Odisha rule or prescribed form using the word. Searched the WBLR Rules 1965 and the Board of Revenue's Manual directly; it does not occur. For Odisha the usage evidence is judicial, not regulatory.
Any instrument using "shatak." The word is on every conversion site and in no document we could reach.
Any rule prescribing the "Ac.0.000" notation. We read one High Court's usage, and say so where we use it.
A second Odisha judgment using this notation, and sourced values for Odisha's gunth-and-mana chain. One judgment was located and the section relying on it says so; the gunth values are listed everywhere online and nowhere citable.
Any judgment applying the DILRMP §5.3.1 sentence.

Method

Nothing here was calculated in floating point. Two definitions are stored (the acre at 43,560 square feet, the international foot at 0.3048 metre), and every other figure is a ratio of whole numbers derived from them, converted to a decimal only when printed.

Every figure in the running text is checked against the stored values rather than against itself.

On the sibling pages

Three pages here describe one area, and the division between them is by document rather than by wording. Everything Kerala and Tamil Nadu have written about this unit (the assignment rules, the land tax, the survey department's table) belongs to the Cent page and is not repeated here. Everything Bihar has written about it belongs under the spelling Bihar uses. This page carries what Jharkhand, West Bengal and Odisha have written, plus the central guideline that uses the word decimal. A reader needing another state's paperwork is better served by the link than by a summary of it here.

Decimal Conversion Quick Reference

Conversion	1 Decimal	Note
Acre	0.01	Exact; Exact by definition: 43,560 sq ft = 4,840 sq yd
Ankanam	6.05 (Standard)	Region-specific; also 12.1 (Tirupati)
Ares	0.40468564224	Exact; 100 m², the metric are
Bigha	0.03025 (West Bengal / Assam / Jharkhand)	Region-specific; also 0.016 (UP pucca / Bihar / Rajasthan pucca) · 0.048 (UP kachha (6⅔ biswa)) · 0.064 (UP kachha (5 biswa) / Uttarakhand hills)
Biswa	0.32 (UP / Rajasthan pucca)	Region-specific; also 0.5 (Rajasthan kachha) · 0.96 (Punjab / Haryana old records) · 1 (Himachal Pradesh)
Biswa Kacha	0.96 (Punjab / Haryana revenue definition)	Region-specific; also 0.5 (Rajasthan kachha reading)
Cent	1	Exact; the same area as a decimal, 435.6 sq ft, under another name
Chatak	9.68	Exact; 5 sq yd exactly; 16 to the cottah, 968 to the acre. Reported, not stated by any instrument located
Dhur	6.4 (Bihar / Jharkhand (Patna chain))	Region-specific; also 121 (Tripura)
Dismil	1	Exact; the same area as a decimal, 435.6 sq ft, under another name
Gaj	48.4	Exact; The square yard, 9 sq ft
Gajam	48.4	Exact; The square yard in Telugu, 9 sq ft
Ground	0.1815	Exact; Tamil Nadu Urban Land Tax Act 1966, s.2(8-A): "an area comprising two hundred and twenty three square metres (two thousand and four hundred square feet)"
Guntha	0.4	Exact; 121 sq yd; 40 guntha = 1 acre exactly
Hectare	0.0040468564224	Exact; 10,000 m² exactly
Kanal	0.08 (Standard (66-inch karam))	Region-specific; also 0.0968 (Majha belt (60-inch karam)) · 0.1054 (Doaba belt (57.5-inch karam)) · 0.119506 (Kapurthala belt (54-inch karam))
Katha	0.605 (West Bengal / Jharkhand)	Region-specific; also 0.32 (Bihar state standard) · 0.15125 (Assam) · 0.25 (Bihar (Chhapra))
Killa	0.01	Exact; The acre under its Punjabi name
Lessa	3.025	Exact; The 12-foot mauzadari jar squared (Assam Land Records Manual r.117); 20 to a katha, 100 to a bigha
Marla	1.6 (Standard (66-inch karam))	Region-specific; also 1.936 (Majha belt (60-inch karam)) · 2.108008 (Doaba belt (57.5-inch karam)) · 2.390123 (Kapurthala belt (54-inch karam))
Murabba	0.0004 (Punjab canal colony)	Region-specific; also 0.00064 (Rajasthan (Indira Gandhi Canal))
Nali	0.201667	Recurring; 240 sq yd; 16 mutthi of 135 sq ft. No instrument located states the figure
Perch	1.6	Exact; 30.25 sq yd; 160 perches = 1 acre
Pura	0.0075625	Exact; 4 Assam bigha of 14,400 sq ft. The 4:1 ratio is SOURCED -- the Supreme Court states it in 1961 and 1971 and the Gauhati High Court in 1986, 2023, 2024 and 2026 -- but no instrument, judgment or manual states the square-foot figure, which is derived from the Assam bigha
Square Centimeter	404,685.64224	Exact; One ten-thousandth of a square metre
Square Feet	435.6	Exact; The base of this series
Square Inch	62,726.4	Exact; One 144th of a square foot
Square Karam	14.4 (Standard (66-inch karam))	Region-specific; also 17.424 (Majha belt (60-inch karam)) · 18.972068 (Doaba belt (57.5-inch karam)) · 21.511111 (Kapurthala belt (54-inch karam))
Square Kilometer	0.000040468564224	Exact; 1,000,000 m²
Square Meter	40.468564224	Exact; The SI unit of area
Square Mile	0.000015625	Exact; Standards of Weights and Measures Act 1976, Schedule (see s.79): "1 square mile = 2 589 988.110 336 square metres"; 640 acres exactly
Square Yard	48.4	Exact; 9 sq ft exactly

Decimal to Acre

1 decimal = 0.01 acres, exact. An acre is exact by definition: 43,560 sq ft = 4,840 sq yd.

Decimal to Acre Formula

Acre = Decimal × 0.01

Popular Decimal to Acre Conversions

Decimal	Acre
1	0.01
2	0.02
3	0.03
5	0.05
10	0.1
20	0.2
50	0.5
100	1
200	2
500	5
1,000	10

Worked Example

5 decimal × 0.01 = 0.05 acres

Reverse Conversion: Acre to Decimal

Decimal = Acre × 100

Decimal to Bigha

1 decimal = 0.03025 bigha on the West Bengal / Assam / Jharkhand definition. The bigha has no single national value. It is also 0.016 (UP pucca / Bihar / Rajasthan pucca) · 0.048 (UP kachha (6⅔ biswa)) · 0.064 (UP kachha (5 biswa) / Uttarakhand hills) and 5 more per decimal. Every definition this series has located is set out with the evidence behind it.

The ratio is the fraction 121/4,000, or 0.03025 exactly.

Decimal to Bigha Formula

Bigha = Decimal × 0.03025 (West Bengal / Assam / Jharkhand)

Popular Decimal to Bigha Conversions

Decimal	Bigha (West Bengal / Assam / Jharkhand)
1	0.03025
2	0.0605
3	0.09075
5	0.15125
10	0.3025
20	0.605
50	1.5125
100	3.025
200	6.05
500	15.125
1,000	30.25

Bigha by Region

Bigha definition	Where it applies	1 bigha in sq ft	Bigha per decimal	Terminates?	Evidence
UP pucca / Bihar / Rajasthan pucca	Purvanchal, Awadh, Patna belt, east Rajasthan	27,225	0.016	Exact	sourced
UP kachha (6⅔ biswa)	West Uttar Pradesh	9,075	0.048	Exact	sourced
UP kachha (5 biswa) / Uttarakhand hills	West UP, Kumaon and Garhwal hills	6,806.25	0.064	Exact	sourced
Rajasthan kachha / Gujarat vigha / Uttarakhand Terai	Marwar, Gujarat, Terai	17,424	0.025	Exact	sourced
Madhya Pradesh	Madhya Pradesh	12,000	0.0363	Exact	reported, not sourced
West Bengal / Assam / Jharkhand (the definition used here)	West Bengal, Assam, Ranchi	14,400	0.03025	Exact	sourced
Himachal Pradesh / Haryana Rohtak belt	Himachal Pradesh, Rohtak, Hisar	8,712	0.05	Exact	sourced
Punjab / west Haryana	Punjab, kanal belt of Haryana	21,780	0.02	Exact	sourced
Haryana Ambala belt	Ambala, Gurugram, Faridabad, Karnal, Panipat	8,100	0.053778	Recurring	sourced

Not every definition above rests on an instrument. 1 of the 9 are marked reported or no instrument located: in circulation and internally consistent, but this series could not find a rule, manual or judgment stating them. What was searched for each is recorded with that unit. Terminates? answers only whether the ratio has a finite decimal, not whether the figure behind it is verified.

To convert against one of the other definitions, multiply by its factor.

Worked Example

5 decimal × 0.03025 = 0.15125 bigha

Reverse Conversion: Bigha to Decimal

Decimal = Bigha ÷ 0.03025 (West Bengal / Assam / Jharkhand)

Decimal = Bigha × 62.5 (UP pucca / Bihar / Rajasthan pucca) Decimal = Bigha ÷ 0.048 (UP kachha (6⅔ biswa)) Decimal = Bigha × 15.625 (UP kachha (5 biswa) / Uttarakhand hills) Decimal = Bigha × 40 (Rajasthan kachha / Gujarat vigha / Uttarakhand Terai) Decimal = Bigha ÷ 0.0363 (Madhya Pradesh) Decimal = Bigha × 20 (Himachal Pradesh / Haryana Rohtak belt) Decimal = Bigha × 50 (Punjab / west Haryana) Decimal = Bigha × 2,250/121 (Haryana Ambala belt)

Decimal to Biswa

1 decimal = 0.32 biswa on the UP / Rajasthan pucca definition. The biswa has no single national value. It is also 0.5 (Rajasthan kachha) · 0.96 (Punjab / Haryana old records) · 1 (Himachal Pradesh) per decimal. Every definition this series has located is set out with the evidence behind it.

The ratio is the fraction 8/25, or 0.32 exactly.

Decimal to Biswa Formula

Biswa = Decimal × 0.32 (UP / Rajasthan pucca)

Popular Decimal to Biswa Conversions

Decimal	Biswa (UP / Rajasthan pucca)
1	0.32
2	0.64
3	0.96
5	1.6
10	3.2
20	6.4
50	16
100	32
200	64
500	160
1,000	320

Biswa by Region

Biswa definition	Where it applies	1 biswa in sq ft	Biswa per decimal	Terminates?	Evidence
UP / Rajasthan pucca (the definition used here)	Uttar Pradesh, east Rajasthan	1,361.25	0.32	Exact	sourced
Rajasthan kachha	Marwar	871.2	0.5	Exact	no instrument located
Punjab / Haryana old records	Punjab, Haryana	453.75	0.96	Exact	sourced
Himachal Pradesh	Himachal Pradesh	435.6	1	Exact	no instrument located

Not every definition above rests on an instrument. 2 of the 4 are marked reported or no instrument located: in circulation and internally consistent, but this series could not find a rule, manual or judgment stating them. What was searched for each is recorded with that unit. Terminates? answers only whether the ratio has a finite decimal, not whether the figure behind it is verified.

To convert against one of the other definitions, multiply by its factor.

Worked Example

5 decimal × 0.32 = 1.6 biswa

Reverse Conversion: Biswa to Decimal

Decimal = Biswa × 3.125 (UP / Rajasthan pucca)

Decimal = Biswa × 2 (Rajasthan kachha) Decimal = Biswa ÷ 0.96 (Punjab / Haryana old records) Decimal = Biswa × 1 (Himachal Pradesh)

Decimal to Biswa Kacha

1 decimal = 0.96 biswa kacha on the Punjab / Haryana revenue definition. The biswa kacha has no single national value. It is also 0.5 (Rajasthan kachha reading) per decimal. Every definition this series has located is set out with the evidence behind it.

The ratio is the fraction 24/25, or 0.96 exactly.

Decimal to Biswa Kacha Formula

Biswa Kacha = Decimal × 0.96 (Punjab / Haryana revenue definition)

Popular Decimal to Biswa Kacha Conversions

Decimal	Biswa Kacha (Punjab / Haryana revenue)
1	0.96
2	1.92
3	2.88
5	4.8
10	9.6
20	19.2
50	48
100	96
200	192
500	480
1,000	960

Biswa Kacha by Region

Biswa Kacha definition	Where it applies	1 biswa kacha in sq ft	Biswa Kacha per decimal	Terminates?	Evidence
Punjab / Haryana revenue definition (the definition used here)	Punjab, Haryana	453.75	0.96	Exact	sourced
Rajasthan kachha reading	Marwar	871.2	0.5	Exact	no instrument located

Not every definition above rests on an instrument. 1 of the 2 are marked reported or no instrument located: in circulation and internally consistent, but this series could not find a rule, manual or judgment stating them. What was searched for each is recorded with that unit. Terminates? answers only whether the ratio has a finite decimal, not whether the figure behind it is verified.

To convert against one of the other definitions, multiply by its factor.

Worked Example

5 decimal × 0.96 = 4.8 biswa kacha

Reverse Conversion: Biswa Kacha to Decimal

Decimal = Biswa Kacha ÷ 0.96 (Punjab / Haryana revenue definition)

Decimal = Biswa Kacha × 2 (Rajasthan kachha reading)

Decimal to Chatak

1 decimal = 9.68 chatak, exact. A chatak is 5 sq yd exactly; 16 to the cottah, 968 to the acre. Reported, not stated by any instrument located.

The ratio is the fraction 242/25, or 9.68 exactly.

Decimal to Chatak Formula

Chatak = Decimal × 9.68

Popular Decimal to Chatak Conversions

Decimal	Chatak
1	9.68
2	19.36
3	29.04
5	48.4
10	96.8
20	193.6
50	484
100	968
200	1,936
500	4,840
1,000	9,680

Worked Example

5 decimal × 9.68 = 48.4 chatak

Reverse Conversion: Chatak to Decimal

Decimal = Chatak ÷ 9.68

Decimal to Gaj

1 decimal = 48.4 gaj, exact. A gaj is the square yard, 9 sq ft.

The ratio is the fraction 242/5, or 48.4 exactly.

Decimal to Gaj Formula

Gaj = Decimal × 48.4

Popular Decimal to Gaj Conversions

Decimal	Gaj
1	48.4
2	96.8
3	145.2
5	242
10	484
20	968
50	2,420
100	4,840
200	9,680
500	24,200
1,000	48,400

Worked Example

5 decimal × 48.4 = 242 gaj

Reverse Conversion: Gaj to Decimal

Decimal = Gaj ÷ 48.4

Decimal to Hectare

1 decimal = 0.0040468564224 hectares, exact. A hectare is 10,000 m² exactly.

The ratio is the fraction 158,080,329/39,062,500,000, or 0.0040468564224 exactly.

Decimal to Hectare Formula

Hectare = Decimal × 0.0040468564224

Popular Decimal to Hectare Conversions

Decimal	Hectare
1	0.0040468564224
2	0.0080937128448
3	0.0121405692672
5	0.020234282112
10	0.040468564224
20	0.080937128448
50	0.20234282112
100	0.40468564224
200	0.80937128448
500	2.0234282112
1,000	4.0468564224

Worked Example

5 decimal × 0.0040468564224 = 0.020234282112 hectares

Reverse Conversion: Hectare to Decimal

Decimal = Hectare ÷ 0.0040468564224

Decimal to Katha

1 decimal = 0.605 katha on the West Bengal / Jharkhand definition. The katha has no single national value. It is also 0.32 (Bihar state standard) · 0.15125 (Assam) · 0.25 (Bihar (Chhapra)) and 2 more per decimal. Every definition this series has located is set out with the evidence behind it.

In Bihar 3.125 decimal make a katha; in West Bengal and Jharkhand 1.653…; in Assam 6.611…. A deed that quotes both is the safest kind to convert from, because the two figures check each other.

The ratio is the fraction 121/200, or 0.605 exactly.

Decimal to Katha Formula

Katha = Decimal × 0.605 (West Bengal / Jharkhand)

Popular Decimal to Katha Conversions

Decimal	Katha (West Bengal / Jharkhand)
1	0.605
2	1.21
3	1.815
5	3.025
10	6.05
20	12.1
50	30.25
100	60.5
200	121
500	302.5
1,000	605

Katha by Region

Katha definition	Where it applies	1 katha in sq ft	Katha per decimal	Terminates?	Evidence
Bihar state standard	Patna, Arrah	1,361.25	0.32	Exact	sourced
West Bengal / Jharkhand (the definition used here)	Rural West Bengal, Ranchi	720	0.605	Exact	sourced
Assam	Assam (except Barak Valley)	2,880	0.15125	Exact	sourced
Bihar (Chhapra)	Saran	1,742.4	0.25	Exact	sourced
Bihar (Hajipur)	Vaishali	1,901.25	0.229112	Recurring	sourced
Bihar (Bettiah)	West Champaran	3,267	0.133333	Recurring	sourced

To convert against one of the other definitions, multiply by its factor.

Worked Example

5 decimal × 0.605 = 3.025 katha

Reverse Conversion: Katha to Decimal

Decimal = Katha ÷ 0.605 (West Bengal / Jharkhand)

Decimal = Katha × 3.125 (Bihar state standard) Decimal = Katha ÷ 0.15125 (Assam) Decimal = Katha × 4 (Bihar (Chhapra)) Decimal = Katha × 4,225/968 (Bihar (Hajipur)) Decimal = Katha × 7.5 (Bihar (Bettiah))

Decimal to Lessa

1 decimal = 3.025 lessa, exact. A lessa is the 12-foot mauzadari jar squared (Assam Land Records Manual r.117); 20 to a katha, 100 to a bigha.

The ratio is the fraction 121/40, or 3.025 exactly.

Decimal to Lessa Formula

Lessa = Decimal × 3.025

Popular Decimal to Lessa Conversions

Decimal	Lessa
1	3.025
2	6.05
3	9.075
5	15.125
10	30.25
20	60.5
50	151.25
100	302.5
200	605
500	1,512.5
1,000	3,025

Worked Example

5 decimal × 3.025 = 15.125 lessa

Reverse Conversion: Lessa to Decimal

Decimal = Lessa ÷ 3.025

Decimal to Square Feet

1 decimal = 435.6 square feet, exact. A square foot is the base of this series.

435.6 square feet to the decimal, one hundredth of an acre. Bihar, Jharkhand, West Bengal and Odisha quote land in decimals and built area in square feet, so both numbers appear in one transaction.

Where the square foot fits into the decimal's own record is set out in Decimal to Square Feet and Square Metres above; what follows is the arithmetic.

The ratio is the fraction 2,178/5, or 435.6 exactly.

Decimal to Square Feet Formula

Square Feet = Decimal × 435.6

Popular Decimal to Square Feet Conversions

Decimal	Square Feet
1	435.6
2	871.2
3	1,306.8
5	2,178
10	4,356
20	8,712
50	21,780
100	43,560
200	87,120
500	217,800
1,000	435,600

Worked Example

5 decimal × 435.6 = 2,178 square feet

Reverse Conversion: Square Feet to Decimal

Decimal = Square Feet ÷ 435.6

Decimal to Square Meter

1 decimal = 40.468564224 square metres, exact. A square metre is the SI unit of area.

A decimal is 40.468564224 square metres, exact, the same figure as a cent, because they are the same unit.

The ratio is the fraction 158,080,329/3,906,250, or 40.468564224 exactly.

Decimal to Square Meter Formula

Square Meter = Decimal × 40.468564224

Popular Decimal to Square Meter Conversions

Decimal	Square Meter
1	40.468564224
2	80.937128448
3	121.405692672
5	202.34282112
10	404.68564224
20	809.37128448
50	2,023.4282112
100	4,046.8564224
200	8,093.7128448
500	20,234.282112
1,000	40,468.564224

Worked Example

5 decimal × 40.468564224 = 202.34282112 square metres

Reverse Conversion: Square Meter to Decimal

Decimal = Square Meter ÷ 40.468564224

Decimal to the Remaining Units

Exactness of the method is not exactness of the result: where a ratio does not terminate, the table says so and the formula gives the fraction.

Decimal to Dhur

1 decimal = 6.4 dhur on the Bihar / Jharkhand (Patna chain) definition; 121 on the Tripura definition. Dhur = Decimal × 6.4 (Bihar / Jharkhand (Patna chain)) · reverse Decimal = Dhur × 0.15625

Decimal	Dhur (Bihar / Jharkhand (Patna chain))
1	6.4
2	12.8
3	19.2
5	32
10	64
20	128
50	320
100	640
200	1,280
500	3,200
1,000	6,400

Dhur, Tripura (3.6 sq ft):

Decimal	Dhur (Tripura)
1	121
2	242
3	363
5	605
10	1,210
20	2,420
50	6,050
100	12,100
200	24,200
500	60,500
1,000	121,000

Decimal to Ankanam

1 decimal = 6.05 ankanam on the Standard definition; 12.1 on the Tirupati definition. Ankanam = Decimal × 6.05 (Standard) · reverse Decimal = Ankanam ÷ 6.05

Decimal	Ankanam (Standard)
1	6.05
2	12.1
3	18.15
5	30.25
10	60.5
20	121
50	302.5
100	605
200	1,210
500	3,025
1,000	6,050