Square Feet to Acres (ft² to ac)

Free online square foot to acre converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.

AREA CONVERTER — INSTANT RESULT
Formula: multiply the square foot value by 2.2956841e-05 — i.e. ac = ft² × 2.2956841e-05
Quick check: 1 ft² = 2.2956841e-05 ac

Square Feet to Acres conversion table

Square Feet (ft²)Acres (ac)
1 ft²2.2956841e-05 ac
2 ft²4.5913682e-05 ac
3 ft²6.8870523e-05 ac
4 ft²9.1827365e-05 ac
5 ft²0.00011478421 ac
6 ft²0.00013774105 ac
7 ft²0.00016069789 ac
8 ft²0.00018365473 ac
9 ft²0.00020661157 ac
10 ft²0.00022956841 ac
15 ft²0.00034435262 ac
20 ft²0.00045913682 ac
25 ft²0.00057392103 ac
30 ft²0.00068870523 ac
40 ft²0.00091827365 ac
50 ft²0.0011478421 ac
75 ft²0.0017217631 ac
100 ft²0.0022956841 ac
250 ft²0.0057392103 ac
500 ft²0.011478421 ac
1,000 ft²0.022956841 ac

How to convert square feet to acres

To convert square feet to acres, multiply the amount in square feet by 2.2956841e-05. For example, 10 ft² = 0.00022956841 ac. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.

Convert between metric and imperial/US land area units, including the acre (43,560 ft² exactly) and hectare (10,000 m²) used worldwide for land measurement.

Frequently asked questions

How many acres are in one square foot?
One square foot is exactly 2.2956841e-05 acres.
How do I convert ft² to ac?
Multiply the ft² value by 2.2956841e-05 to get ac. The converter at the top of this page does this automatically and works in both directions.
How much is 100 square feet in acres?
100 square feet equals 0.0022956841 acres.

Related area conversions

All Area unitsAcres to Square Feet (ac to ft²) — reverse conversionin² → cm²km² → mi²cm² → in²mm² → in²