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# Convert Square Feet to Acres

Please provide values below to convert square foot [ft^2] to acre [ac], or vice versa.

 From: square foot To: acre

Definition: Square Foot
Square foot (symbol: sq ft) is an area unit used in the imperial and US customary systems. It is defined as the area of a square with sides of 1 foot. One square foot equals to 144 square inches.

Definition: Acre
Acre (symbol: ac) is a unit of land area used in the imperial and US customary systems. It is defined as the area of 1 chain (66 feet) by 1 furlong (660 feet), which is exactly equal to 1/640 of a square mile or 43,560 square feet. The most commonly used acre today is the international acre, which is defined as exactly 4,046.8564224 square meters in 1959.

### Square Foot to Acre Conversion Table

Square Foot [ft^2]Acre [ac]
0.01 ft^22.2956841138659E-7 ac
0.1 ft^22.2956841138659E-6 ac
1 ft^22.2956841138659E-5 ac
2 ft^24.5913682277319E-5 ac
3 ft^26.8870523415978E-5 ac
5 ft^20.0001147842056933 ac
10 ft^20.00022956841138659 ac
20 ft^20.00045913682277319 ac
50 ft^20.001147842056933 ac
100 ft^20.0022956841138659 ac
1000 ft^20.022956841138659 ac

### How to Convert Square Foot to Acre

1 ft^2 = 2.2956841138659E-5 ac
1 ac = 43560 ft^2

Example: convert 15 ft^2 to ac:
15 ft^2 = 15 × 2.2956841138659E-5 ac = 0.00034435261707989 ac