Area Converter

Convert between area units like square meters, hectares, acres with ease. Perfect for land measurements, house plans, and other area calculations.

From Unit

To Unit

How to Use Area Converter?

1. Enter the area value you want to convert
2. Select the source unit (e.g. square meters)
3. Select the target unit (e.g. hectares)
4. Click the "Convert" button

Tips:
- Use dot (.) for decimal numbers
- Negative values are not allowed
- Results are shown up to 4 decimal places for precision
- All common area units are supported

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Area conversion and the squared-factor trap

Area conversion catches people out for one reason: the linear factor has to be squared. Metres to feet is 3.2808, but square metres to square feet is 10.764. Applying the linear factor to an area produces an answer roughly three times too small, and it looks plausible enough to pass unchecked.

Formula

target = source x (source factor to m^2 / target factor to m^2)

If you know a linear conversion factor k, the corresponding area factor is k^2 and the volume factor is k^3.

Why the factor is squared

A square metre is a square one metre on each side. Converting to feet converts both sides, so the factor applies twice: 3.2808 x 3.2808 = 10.7639.

The same logic makes a square metre 10,000 square centimetres rather than 100, and a cubic metre 1,000,000 cubic centimetres rather than 100.

A quick sanity check: converting to a smaller unit must give a larger number, and the increase must be far larger for area than for length. If your converted area is only about three times different when the linear ratio is three, you have applied the factor once instead of twice.

Land units are regional and rarely round

Agricultural and land units evolved locally and most predate metrication, so they convert awkwardly.

Hectare: 10,000 m^2, a square 100 m on a side. The international standard for land area and the only tidy one.
Acre: 4,046.86 m^2, historically the area one man with one ox could plough in a day. A hectare is about 2.471 acres.
Dunam: 1,000 m^2 in its metric form, used in Turkey, Israel, and parts of the Balkans. The Ottoman dunam was about 919 m^2, so historical records differ.
Rai: 1,600 m^2 in Thailand. Tsubo: 3.3058 m^2 in Japan, the area of two tatami mats.
A football pitch is not a unit. UEFA pitches range from roughly 6,400 to 8,250 m^2, so the popular comparison is imprecise by up to 30%.

Where the error costs money

Materials are priced by area, so a squared-factor mistake scales the entire order.

A 400 sq ft room is 37.16 m^2. Applying the linear factor of 3.2808 instead would give 121.9 m^2 - more than three times too much flooring, and a substantial over-order.

The reverse error is worse in construction: under-ordering by a factor of three stops a job and often means paying for a second delivery and a second batch of a material whose colour may not match.

Worked example

A land parcel is listed at 2.5 acres and you need it in hectares and square metres.

To square metres: 2.5 x 4,046.86 = 10,117.15 m^2. To hectares: 10,117.15 / 10,000 = 1.0117 ha.

In square feet: 10,117.15 x 10.7639 = 108,900 sq ft. Checking against the definition, an acre is 43,560 sq ft, and 2.5 x 43,560 = 108,900. The two routes agree exactly, which confirms the squared factor was applied correctly.

Area units in square metres

Unit	In m^2	Region or use
square centimetre	0.0001	Universal
square foot	0.092903	US, UK property
square yard	0.836127	Carpet, textiles
tsubo	3.30579	Japan
are	100	Agriculture, rare
dunam	1,000	Turkey, Israel, Balkans
rai	1,600	Thailand
acre	4,046.856	US, UK land
hectare	10,000	International standard
square kilometre	1,000,000	Regional and national areas

Frequently Asked Questions

Because both dimensions convert. A square metre is 100 cm by 100 cm, which is 10,000 cm^2. The linear factor of 100 is squared.

10.7639, which is 3.2808 squared. Using 3.2808 directly is the single most common area conversion error and understates the result by a factor of 3.28.

4,046.86 m^2, or a square about 63.6 m on each side. A hectare is roughly 2.47 acres. An acre was traditionally a furlong long by a chain wide, which is why it is not a round number.

A land unit of 1,000 m^2 in its modern metric form, used in Turkey, Israel, Cyprus, and parts of the Balkans. Older Ottoman-era records use about 919 m^2, so historic deeds need care.

Yes, cubed rather than squared. A cubic metre is 35.315 cubic feet, which is 3.2808 cubed, and 1,000,000 cubic centimetres.

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References

Last reviewed: 2026-08-07. This page is informational. For legal, medical, tax, or financial decisions, confirm the result with a qualified professional.