Square feet (ft²) to Acres (ac) Conversion
Square feet
The square foot is a unit of area equal to exactly 0.09290304 square metres (the square of 0.3048 m). It is the primary unit for measuring floor area and property size in the United States and United Kingdom, and appears in real estate listings, construction blueprints, and rental agreements. Average apartment sizes in the US are commonly described in square feet, where a studio apartment might be 400–600 ft².
Acres
The acre is a unit of area equal to exactly 4,046.8564224 square metres, the standard unit for land measurement in the United States and United Kingdom. Its origin lies in medieval English agriculture: an acre was the amount of land a yoke of oxen could plough in a single day, standardised as a furlong (220 yards) long and a chain (22 yards) wide — exactly 43,560 square feet. One square mile contains exactly 640 acres.
| Square feet (ft²) | Acres (ac) |
|---|---|
| 0.1 ft² | 2.2956841138659E-6 ac |
| 1 ft² | 2.2956841138659E-5 ac |
| 2 ft² | 4.5913682277319E-5 ac |
| 3 ft² | 6.8870523415978E-5 ac |
| 5 ft² | 0.0001147842056933 ac |
| 10 ft² | 0.00022956841138659 ac |
| 20 ft² | 0.00045913682277319 ac |
| 30 ft² | 0.00068870523415978 ac |
| 50 ft² | 0.001147842056933 ac |
| 100 ft² | 0.0022956841138659 ac |
| 1000 ft² | 0.022956841138659 ac |