Type a value into any field and instantly see it converted across square feet, square meters, square yards, acres, hectares, square kilometers and square miles.
Runs entirely in your browser — nothing you enter is uploaded or stored.
Sq ft, sq m, sq yd, acres, hectares, sq km and sq mi all update together.
Built on legally defined values, not rounded approximations.
No accounts, no uploads — every calculation stays on your device.
Enter an area in whichever unit you already have, and the rest fill in automatically.
Area units mix imperial and metric systems depending on context: real estate in the US is measured in square feet and acres, land in most of the world in square meters and hectares, and countries or large regions in square kilometers or square miles. Converting between them correctly matters for property listings, farming and construction quotes.
This tool routes every conversion through square meters as a common base, using exact definitions: a foot is exactly 0.3048 meters, so a square foot is exactly 0.09290304 square meters, and an acre is defined as exactly 43,560 square feet (4,046.8564224 square meters). Because these are exact legal definitions, the results carry no rounding error beyond floating-point display.
One acre is exactly 43,560 square feet — roughly the size of a US football field without the end zones.
A hectare (10,000 m²) is about 2.471 acres, and is the standard metric unit for farmland and forestry.
Carpet and flooring are often priced per square yard in the US; 1 square yard equals exactly 9 square feet.
Square kilometers and square miles are used for cities, countries and geography — 1 sq mi is about 2.59 km².
Common questions about converting between square feet, square meters, acres and more.
One acre equals exactly 43,560 square feet. In metric terms an acre is exactly 4,046.8564224 square meters.
One hectare equals exactly 10,000 square meters, which works out to about 2.4711 acres.
One square yard equals exactly 9 square feet, since a yard is 3 feet on each side. One square yard also equals exactly 0.83612736 square meters.
One square mile equals exactly 2.589988110336 square kilometers, or about 640 acres.
The conversion factors used are the exact legally defined values (1 foot = 0.3048 m, 1 acre = 43,560 sq ft), so the arithmetic is precise. Always confirm figures against an official survey for legal or financial decisions.