Square Feet to Acres Converter
Convert square feet to acres instantly. 1 ft² = 0.0000229568 acres. Formula, table and reading a US property deed correctly.
Written by Rahman · Last reviewed
Quick answer
One square foot equals 0.0000229568 acres. Divide square feet by 43,560 to get acres, so a 10,000 sq ft lot is about 0.23 acres.
| Square metre (m²) | 0.09290304 |
| Square kilometre (km²) | 9.290304e-8 |
| Square centimetre (cm²) | 929.0304 |
| Square millimetre (mm²) | 92903.04 |
| Hectare (ha) | 0.000009290304 |
| Acre (ac) | 0.00002295684114 |
| Square mile (mi²) | 3.587006e-8 |
| Square yard (yd²) | 0.1111111111 |
| Square foot (ft²) | 1 |
| Square inch (in²) | 144 |
ft² to ac conversion table
| ft² | ac |
|---|---|
| 1 ft² | 0.00002295684114 ac |
| 2 ft² | 0.00004591368228 ac |
| 3 ft² | 0.00006887052342 ac |
| 4 ft² | 0.00009182736455 ac |
| 5 ft² | 0.0001147842057 ac |
| 6 ft² | 0.0001377410468 ac |
| 7 ft² | 0.000160697888 ac |
| 8 ft² | 0.0001836547291 ac |
| 9 ft² | 0.0002066115702 ac |
| 10 ft² | 0.0002295684114 ac |
| 20 ft² | 0.0004591368228 ac |
| 30 ft² | 0.0006887052342 ac |
| 40 ft² | 0.0009182736455 ac |
| 50 ft² | 0.001147842057 ac |
| 60 ft² | 0.001377410468 ac |
| 70 ft² | 0.00160697888 ac |
| 80 ft² | 0.001836547291 ac |
| 90 ft² | 0.002066115702 ac |
| 100 ft² | 0.002295684114 ac |
| 250 ft² | 0.005739210285 ac |
| 500 ft² | 0.01147842057 ac |
| 1000 ft² | 0.02295684114 ac |
How to convert ft² to ac
US property deeds and zoning documents often state lot size in square feet for smaller residential parcels but switch to acres for anything larger, so a buyer comparing a "0.25 acre lot" against a competing "12,000 sq ft lot" needs this conversion to tell that the second listing (0.275 acres) is actually the larger of the two.
Because 43,560 is an exact figure, dividing by it never needs rounding at the input stage. The only rounding happens in how many decimal places the final acreage is displayed to, which is why acreage on real-estate listings is often quoted to two or three decimal places rather than as a round number. Land surveyors sometimes report a small parcel in square feet specifically to avoid the false precision of a fractional-acre figure, switching to acres only once a parcel is large enough for the unit to feel natural.