Area Converter
Convert between square metres, square kilometres, acres, hectares, square feet, square miles, square inches, square yards, and more — all area units instantly.
All Unit ConvertersAll conversions from 1 square metre
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Area Units — How They Relate
The square metre (m²) is the SI base unit of area. Every other unit converts to it via a fixed factor — metric units by powers of 10, imperial units by the squared versions of their length definitions.
The acre is one of the most-searched conversions: defined as 4046.856 m² (the area of one chain × one furlong). A hectare is exactly 10,000 m² — roughly the size of a square with 100 m sides.
Land measurement systems vary globally. Europe and most of the world use hectares. The US uses acres and square miles. India uses bigha (regionally variable). This tool covers the standardised international units.
22 units covered
Key area facts and reference values
1 hectare
10,000 m² = 2.471 acres = 107,639 ft². About the area of a square 100 m × 100 m, or roughly 1.4 football pitches.
1 acre
4,046.86 m² = 0.4047 ha = 43,560 ft². Originally the area one man could plough in a day with an ox.
1 square mile
2.59 km² = 259 ha = 640 acres = 1 US land section. New York’s Central Park is about 3.41 km².
1 square kilometre
1,000,000 m² = 100 ha = 247.1 acres = 0.386 mi². Monaco’s total area is approximately 2.02 km².
1 square foot
0.0929 m² = 144 in² = 0.111 yd². US real estate is almost universally listed in square feet.
Barn (nuclear physics)
10⁻²⁸ m². Used to measure nuclear cross-sections. “Big as a barn” was ironic — it is extraordinarily small.
Common Questions
FAQ: Area Converter
One acre equals exactly 43,560 square feet. It is also equal to 4840 square yards, 10 square chains, or approximately 4046.86 square metres. An acre is roughly the size of an American football field (without the end zones).
One hectare equals 2.47105 acres. Equivalently, one acre equals 0.404686 hectares. The hectare is the standard land measurement unit in most of the world outside the US. 100 hectares equals 1 square kilometre.
Multiply square metres by 10.7639 to get square feet. Or divide by 0.0929. One square metre equals approximately 10.76 square feet. For a quick mental estimate: multiply by 10 and add 7.6% for a rough number.
An are (a) equals 100 square metres — a 10 m × 10 m square. A decare (daa) equals 1000 square metres, or 10 ares. A hectare is 100 ares. The are and decare are used in some European and Turkish land registration systems, though hectares are more common globally.
A US survey section is a land parcel of exactly 1 square mile (640 acres). 36 sections make up a township (6 miles × 6 miles). This grid system was established by the Land Ordinance of 1785 and is how most US land in the Midwest and West was originally divided and sold.
One square mile equals 2.589988 km². One square kilometre equals 0.386102 square miles. So a square kilometre is about 38.6% the size of a square mile. Country areas in Europe are typically reported in km²; in the US, often in square miles.