🗺️ Area

Area Converter

Convert floor plans, plots of land and property listings between square metres, square feet, acres and hectares. Enter your number, pick the units, then press Convert.

Written and reviewed by SM Arijul Islam · Last reviewed 28 October 2026 · Editorial standards · Report an error

About the area converter

Area is a two-dimensional measurement, so conversion factors are the square of the corresponding length factors. That is why one square metre equals 10.7639 square feet rather than 3.28. This tool keeps that maths invisible for you.

Handy area facts

1 square metre = 10.7639 square feet
1 acre = 4,046.8564 m² = 43,560 ft²
1 hectare = 10,000 m² = 2.47105 acres
1 square mile = 640 acres = 2.58999 km²
1 are = 100 m²

Working on a renovation budget? Combine this with the Length Converter and the Percentage Calculator for material wastage.

Acre, hectare and square metre quick answers

Acre questions arrive in two shapes: a single value to convert (1 acre in square meters, square meters to square feet) or a pair to compare (acre to hectare, hectare to acre). Both are the same factor applied in opposite directions. One acre is 4,046.86 m² and 0.404686 hectare, so 1 hectare in acres is 2.47105 and acre to sq ft is 43,560. In the traditional units used across South Asia, the same acre is 100 decimal, 60.5 Bengal katha or 3.025 Bengal bigha.

Common acre, hectare and decimal conversions
Conversion	Result	Reverse
1 acre in square meters	4,046.86 m²	1 m² = 0.000247105 acre
1 hectare in acres	2.47105 acres	1 acre = 0.404686 hectare
acre to hectare	× 0.404686	hectare to acre: × 2.47105
acre to sq ft	43,560 ft²	1 ft² = 0.000022957 acre
square meters to square feet	× 10.7639	1 ft² = 0.092903 m²
1 decimal in square feet	435.6 ft²	1 ft² = 0.0022957 decimal
1 shotok in square feet	435.6 ft²	shotok and decimal are the same unit
1 kani in decimal	40 decimal	1 kani = 17,424 ft²

Regional land units (bigha, katha, decimal and shotok)

Property and farmland across Bangladesh, Nepal and eastern India is still bought and sold in units that never appear on a metric chart. The figures below are the standard Dhaka and West Bengal values, which are what most listings use.

Common South Asian land units expressed in square feet and square metres
Unit	Square feet	Square metres	Also written as
1 katha	720	66.89	1.653 decimal · 16 chotak
1 bigha	14,400	1,337.8	20 katha · 33.06 decimal
1 decimal	435.6	40.47	shotok · shotangsho · 1/100 acre
1 chotak	45	4.18	chatak · 1/16 katha
1 kani	17,424	1,618.7	40 decimal
1 acre	43,560	4,046.86	60.5 katha · 3.025 bigha · 100 decimal
1 hectare	107,639	10,000	149.5 katha · 7.475 bigha

Regional exceptions matter: a katha is roughly 1,620 sq ft in parts of Rajshahi, and in Assam one bigha equals 5 katha rather than 20. There is no single nationwide answer, so confirm the district before a transaction.

How to convert area

Area measures a two-dimensional surface. Because the units are squared, conversion factors are squared too: one foot is 0.3048 metres, so one square foot is 0.3048² = 0.09290304 square metres. That is why an acre works out to exactly 4,046.8564224 m², and why a hectare — a square measuring 100 m on each side — is exactly 10,000 m². Multiplying a squared factor by the wrong power is the most common mistake in area conversions.

Common area conversions

One square meter expressed in other units of area
Unit	1 square meter equals
Square centimeter (cm²)	10,000
Square inch (in²)	1,550.0031
Square foot (ft²)	10.76391
Square yard (yd²)	1.19599
Acre (ac)	0.00024710538
Hectare (ha)	0.0001
Square kilometer (km²)	0.000001
Square mile (mi²)	0.00000038610216

Everyday uses

Property listings, plots and land registration
Flooring, tiling and paint coverage
Geography, maps and satellite imagery
Gardening and landscaping
Fabric and material quantities

Frequently asked questions

How many square feet in an acre?

Exactly 43,560 ft², which is 4,046.8564224 m² or 0.40468564 hectares.

How many acres are in a hectare?

1 hectare (10,000 m²) is about 2.4710538 acres.

Does an acre have to be square?

No. An acre is simply 43,560 ft²; the traditional dimensions are one chain (66 ft) by one furlong (660 ft), a long thin rectangle.

How do I convert square metres to square feet?

Multiply by 10.76391 — the square of the 3.28084 feet in a metre.

How many square feet is 1 katha?

720 sq ft (66.89 m²) under the Bangladesh and West Bengal standard, which is about 1.653 decimal and one sixteenth of a bigha. Parts of Rajshahi use a larger katha of roughly 1,620 sq ft.

How many katha are in 1 bigha?

20 katha, or 14,400 sq ft — about 33.06 decimal and roughly a third of an acre. In Assam the bigha is only 5 katha, so check the region.

How many square feet is 1 decimal or shotok?

435.6 sq ft (40.47 m²). A decimal, shotok or shotangsho is simply one hundredth of an acre, so 100 decimal make 1 acre and 1 acre is 100 decimal.

More worked examples

A room 12 m by 10 m is 120 m², which is about 1,291.67 sq ft.
A 1,500 sq ft apartment is about 139.35 m².
One acre is 4,046.86 m², or exactly 43,560 sq ft.
One hectare is 10,000 m², which is about 2.47105 acres.

Quick reference

Common exact area conversion factors
Conversion	Exact value
1 square metre	10.7639 sq ft
1 square foot	0.092903 m²
1 square yard	0.836127 m²
1 acre	4,046.86 m²
1 acre	43,560 sq ft
1 hectare	10,000 m²
1 square mile	2.58999 km²
1 decimal (1/100 acre)	435.6 sq ft

Common mistakes to avoid

Treating area factors like length factors. One metre is 3.28084 feet, but one square metre is 10.7639 square feet, because the factor is squared.
Picturing an acre as a square. It is 43,560 sq ft, historically the area a team of oxen could plough in a day, so it is a long thin strip.
Assuming land units such as the bigha, katha, decimal, shotok or guntha are universal. Their size varies by country and often by district.
Using hectare and acre as if they were close. A hectare is about 2.47 acres, so the difference is large over a whole field.

Further questions

Why is one square metre 10.7639 square feet?

Because one metre is 3.28084 feet, and area scales with the square of the length factor: 3.28084 × 3.28084 = 10.7639.

What is the difference between an acre and a hectare?

An acre is 4,046.86 m² and a hectare is 10,000 m², so one hectare is about 2.47 acres. The hectare is metric and used in most of the world.

What is a bigha?

A traditional South Asian land unit with no single standard value. Depending on the region it ranges from roughly 1,600 to 27,000 square feet, so always confirm the local definition.

Sources and standards

Area factors are squared lengths, so they follow from the metre and from the exact customary lengths in NIST SP 811. The international acre is 4,046.8564224 m², derived from the 1959 yard; the older US survey acre differs by about four parts per million, which matters only in boundary surveys.

How many square feet in an acre

There are exactly 43,560 square feet in an acre, which is also 4,046.86 square metres, 4,840 square yards and 0.404686 hectares. A quarter acre is 10,890 sq ft and half an acre is 21,780 sq ft.

Acre, hectare and square foot equivalents
Conversion	Value
1 acre in square meters	4,046.8564 m²
acre to sq ft	43,560 sq ft
acre to hectare	0.404686 ha
hectare to acre	2.471054 ac
1 hectare in acres	2.471 ac
square meters to square feet	× 10.7639
1 decimal in square feet	435.6 sq ft

A decimal is one hundredth of an acre, so 100 decimal make an acre. For whole pages on one conversion, see acres to hectares, hectares to acres, square feet to square metres, square metres to square feet and acres to square feet.