Complete guide to traditional and modern land measurement units used in the United Kingdom. Convert between acres, hectares, square metres, square feet, and traditional British units like roods and perches.
| From Unit | To Unit | Conversion Factor | Example |
|---|---|---|---|
| 1 Acre | Hectares | 0.40468564224 | 10 acres = 4.047 hectares |
| 1 Hectare | Acres | 2.4710538147 | 5 hectares = 12.355 acres |
| 1 Square Metre | Square Feet | 10.763910417 | 100 m² = 1,076.39 ft² |
| 1 Acre | Square Metres | 4046.8564224 | 2 acres = 8,093.71 m² |
| 1 Rood | Square Metres | 1011.7141056 | 4 roods = 4,046.86 m² |
| 1 Perch | Square Metres | 25.29285264 | 40 perches = 1,011.71 m² |
| 1 Square Mile | Acres | 640 | 0.5 sq mi = 320 acres |
Hectare (ha): 10,000 square metres. Standard unit for larger land areas.
Square Metre (m²): Basic SI unit for area measurement.
Square Kilometre (km²): 1,000,000 square metres. Used for very large areas.
Acre: 4,840 square yards or 43,560 square feet. Most common traditional unit.
Rood: ¼ acre or 1,210 square yards. Often used in old deeds.
Perch: Also called rod or pole. 30¼ square yards or 1/160 acre.
Square Foot (ft²): Most common unit for property sizes.
Square Yard (yd²): 9 square feet. Used in construction.
Square Mile: 640 acres. Used for geographical areas.
Acres Roods Perches: Traditional system: 1 acre = 4 roods = 160 perches.
ARP System: Still used in some land registry documents.
Farm Size: UK farms typically measured in hectares (average 87ha).