Square feet to acres

1 square foot = 0.0000229568 acres

Type a value in square feet (sq ft) to get acres (ac) straight away. A square foot is smaller than an acre, so the number goes down. Both units belong to area, measured here against the square meter.

FromTo0.000022956841

1 sq ft = 0.000022956841 ac

Formula

ac = sq ft × 0.000022956841

One square foot is 0.000022956841 acres, so multiply by that factor. You can also divide by 43,560, the number of square feet in one acre. Here sq ft is the value in square feet and ac is the result in acres.

Worked example: 1,200 square feet × 0.000022956841 = 0.0275482 acres.

Square feet to acres table

square feet (sq ft)	acres (ac)
1 sq ft	0.0000229568 ac
2 sq ft	0.0000459137 ac
3 sq ft	0.0000688705 ac
4 sq ft	0.0000918274 ac
5 sq ft	0.000114784 ac
6 sq ft	0.000137741 ac
7 sq ft	0.000160698 ac
8 sq ft	0.000183655 ac
9 sq ft	0.000206612 ac
10 sq ft	0.000229568 ac
15 sq ft	0.000344353 ac
20 sq ft	0.000459137 ac
25 sq ft	0.000573921 ac
30 sq ft	0.000688705 ac
40 sq ft	0.000918274 ac
50 sq ft	0.00114784 ac
60 sq ft	0.00137741 ac
75 sq ft	0.00172176 ac
100 sq ft	0.00229568 ac

Everyday square feet in acres

What it is	sq ft	ac
a small bedroom	100 sq ft	0.00229568 ac
a 1 BHK flat	600 sq ft	0.0137741 ac
a 2 BHK flat	1,000 sq ft	0.0229568 ac
a 3 BHK flat	1,500 sq ft	0.0344353 ac
a 40 × 60 ft plot	2,400 sq ft	0.0550964 ac

Quick estimate in your head

Multiply by about 0.000023. For 1,200 sq ft that gives 0.0276 ac against an exact 0.0275482 ac, an error of 0.2%.

About the units

Square foot (sq ft). A square 1 foot on each side, 0.0929 m². The usual unit for flat and office sizes in India and the US.

Acre (ac). 43,560 square feet or about 4,047 m². Used for farmland and estates in India, the US and UK.

Going the other way, 1 acre is 43,560 square feet.

Questions

How many acres are in 1 square foot?

1 square foot is 0.0000229568 acres, and 1 acre is 43,560 square feet.

How do I convert square feet to acres?

Use ac = sq ft × 0.000022956841. For example, 1,200 square feet × 0.000022956841 = 0.0275482 acres.

Is the square foot to acre factor exact?

The factor comes from the unit definitions. Results here are rounded to 6 significant digits for display.

How much is a 40 × 60 ft plot in acres?

2,400 sq ft is 0.0550964 ac.

Source for the conversion factor: NIST Handbook 44, Appendix C (units of area).

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