Area Unit Converter
Convert between hectares, acres, square metres, square kilometres, square feet, square yards and square miles. Type a value and every unit updates live. Free, runs in your browser.
Common area conversions
| From | To | Factor |
|---|---|---|
| 1 hectare | 2.471 acres | ×2.471 |
| 1 acre | 4,047 m² | ×4046.86 |
| 1 km² | 0.3861 mi² | ×0.3861 |
| 1 m² | 10.764 ft² | ×10.764 |
Frequently Asked Questions
What units of area does this converter support?
Square metres (m²), square kilometres (km²), hectares (ha), acres (ac), square feet (ft²), square yards (yd²), square miles (mi²), and the surveyor's sections used in US land descriptions. Type a value and every other unit updates live.
What is the difference between a hectare and an acre?
A hectare is 10,000 m² (a square 100 m on a side) — the SI unit for land area. An acre is 4,046.856 m² (~4,047 m²), a traditional unit roughly the area one ox could plough in a day. 1 hectare ≈ 2.471 acres.
Are these the international or US survey units?
All conversions use the modern international definitions: 1 inch = 25.4 mm exactly, 1 foot = 0.3048 m exactly. The US survey foot differs by ~2 parts per million and matters only for high-precision cadastral work — for everyday use the values are identical.
How precise are the conversions?
Six significant figures are shown, which is more than enough for any practical land measurement. The underlying factors are exact by definition (e.g. 1 acre = 43,560 ft² exactly).