Acre to Square Foot Converter (ac to ft²)

1 acre = 43,560.1 square foot. An acre is 43,560 square feet, which is a rectangle 66 ft by 660 ft (one chain by one furlong).

Value

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Result

10,890.014

0.25 ac = 10,890.014 ft²

How to convert acre to square foot

An acre is 43,560 square feet, which is a rectangle 66 ft by 660 ft (one chain by one furlong). It is how US lots and farmland are measured and compared with house sizes.

Formula

ft² = ac × 43,560.1

Worked example

0.25 ac × 43,560.1 = 10,890 ft²

Acre to Square Foot quick-reference table

Common acre to square foot values
Acre (ac)	Square Foot (ft²)
0.1 ac	4,356.01 ft²
0.25 ac	10,890 ft²
0.5 ac	21,780 ft²
1 ac	43,560.1 ft²
2 ac	87,120.1 ft²
5 ac	217,800 ft²

Real-life examples

A quarter-acre lot is 10,890 sq ft, and a half-acre lot is 21,780 sq ft.

Frequently asked questions

How many square feet are in an acre?

One acre is 43,560 square feet.

How many acres is a 1,000 sq ft house?

A 1,000 sq ft footprint is 0.023 acre.

What is 1 acre in square foot?

1 acre = 43,560.1 square foot (ac to ft²).

What is the formula to convert ac to ft²?

ft² = ac × 43,560.1. For example, 0.25 ac × 43,560.1 = 10,890 ft².

How do I convert ft² back to ac?

Use the reverse converter: 1 square foot = 0.0000229568 acre. Check: 10,890 ft² converts back to 0.25 ac.

Reverse conversion

Need the other direction? Square Foot to Acre converter (ft² to ac): 1 square foot = 0.0000229568 acre.

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