About the Area Converter
The Area Converter turns any surface measurement into every other common area unit — square meters, square feet, hectares, acres, square kilometers, square miles — all at once. Type in any field and every other one updates instantly. There is no "convert" button; every field is both an input and an output.
Nothing you type is sent anywhere. All arithmetic runs in your browser.
Common uses
- Real estate — apartment sizes are commonly listed in m² in Europe and ft² in the US.
- Land & property — plots quoted in acres (US, UK) or hectares (rest of world).
- Farming & agriculture — a hectare is roughly 2.47 acres.
- Country & region size — geography quoted in km² or square miles.
- Interior design & flooring — carpet, tile, and paint quantities from ft² ↔ m².
Supported units
Metric: square millimeter (mm²), square centimeter (cm²), square meter (m²), are (a = 100 m²), hectare (ha = 10,000 m²), square kilometer (km²).
Imperial & US: square inch (in²), square foot (ft²), square yard (yd²), acre, square mile (mi²).
Exact conversion ratios
All conversion uses the internationally agreed length definition (1 inch = 25.4 mm exactly), so area ratios are exact:
- 1 m² = 10.76391041... ft² (= 1 / 0.09290304)
- 1 ft² = 0.09290304 m² exactly
- 1 yd² = 9 ft² = 0.83612736 m²
- 1 acre = 43,560 ft² = 4046.8564224 m² (= 1/640 sq mile)
- 1 hectare = 10,000 m² = 2.4710538... acres
- 1 km² = 100 hectares = 247.10538... acres = 0.3861... sq mile
- 1 sq mile = 640 acres = 2,589,988.110336 m² = 2.589988 km²
Rules of thumb
- 1 hectare ≈ 2.5 acres — memorize this ratio for quick land conversions.
- 1 acre ≈ 0.4 hectare — the inverse.
- 1 m² ≈ 10.76 ft² — a small studio apartment of 25 m² is roughly 270 ft².
- 1 km² ≈ 0.39 sq mile — Manhattan is about 59 km² / 22.7 sq mi.
- 1 acre ≈ area of an American football field without the end zones (about 91% of one).
Privacy
All conversion runs client-side. Your inputs never leave your browser.