How many square feet are in a acre?

1 ac = 43560 ft². To convert any amount, multiply by 43560.

How do you convert acres to square feet?

Multiply the number of acres by 43560 to get square feet. The formula is shown in the "How it's calculated" section above.

Where does the conversion factor come from?

It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.

Unit converter — Area

Acres to square feet converter

Convert acres (ac) to square feet (ft²). Source-cited conversion factor, exact to the displayed precision.

Results are mathematically exact for the displayed precision. How we calculate.

How it's calculated

Convert acres to square feet— the formula

Acres convert to square feet by multiplying by the published conversion factor. The factor below is exact to the precision shown, sourced from the citation under the formula.

ft² = ac × 43560

ac = ft² × 2.2957e-5

Derived from the length conversion factors. 1 acre = 4046.8564224 m² (international acre, 43560 ft²).

Questions

Frequently asked questions

How many square feet are in a acre?
1 ac = 43560 ft². To convert any amount, multiply by 43560.
How do you convert acres to square feet?
Multiply the number of acres by 43560 to get square feet. The formula is shown in the "How it's calculated" section above.
Where does the conversion factor come from?
It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.