Convert any area unit in one place
Area measurements span a huge range, from a room in square feet to a country in square kilometres. Different fields and regions favour different units: builders use m² and ft², farmers and land registries use acres and hectares, and maps use km² and square miles. This reference converts between all of them from a single input.
How it works
Each unit has an exact factor to the SI base, the square metre. Your value is converted to square metres first, then out to each target unit:
1 ft² = 0.09290304 m² (0.3048 squared)
1 yd² = 0.83612736 m²
1 acre = 4046.8564 m²
1 hectare= 10000 m² (exact)
1 km² = 1000000 m²
1 mile² = 2589988.11 m²Routing through one base avoids the compounding error you get from multiplying a chain of unit-to-unit factors directly.
Tips and notes
- A hectare is exactly 10,000 m² — a square 100 m on a side.
- An acre is close to a standard football pitch; a hectare is about 2.47 acres.
- For land deals, confirm whether “acre” means the international acre (used here) or a regional survey acre, which differs slightly.
- A square kilometre equals 100 hectares, handy for converting large parcels.