Area Converter

How to use it

Type an area, choose the unit it is in and the unit you want, then press Calculate. You can type decimals, fractions such as 3/8, mixed numbers such as 1 1/2, very large or small numbers such as 2.5e6, and simple sums such as 2*3. Swap exchanges the two units.

The answer is worked out exactly and only rounded for display, to 12 significant figures. Below it you get the same value in every other unit on the list, and Show the working gives the conversion factor that was used. Because every unit here is defined exactly, converting there and back always returns your original number.

Why area factors are squares

An area unit is a length unit multiplied by itself, so its conversion factor is the length factor squared. A foot is 0.3048 metres, so a square foot is 0.3048 × 0.3048 = 0.09290304 square metres. Forgetting to square the factor is the most common area conversion mistake: 10 square feet is about 0.93 square metres, not 3.05.

1 ft² = 0.3048² m² = 0.09290304 m²
1 yd² = 9 ft²
1 acre = 43,560 ft² = 4,046.8564224 m²
1 mi² = 640 acres

Hectares, ares and acres

Land is usually measured in acres in the United States and in hectares almost everywhere else. A hectare is a square 100 metres on each side (10,000 m²), and an are is a square 10 metres on each side (100 m²). One hectare is about 2.47 acres, and one acre is about 0.405 hectares.

Questions