How many square feet are in one acre?

There are 43,560 square feet in 1 acre.

How do you convert square feet to acres?

Multiply the number of square feet by 0.000022957 — or use the formula ac = ft² ÷ 43,560.

What is 6 square feet in acres?

6 square feet is 0.000137741 acres. 6 ÷ 43,560 = 0.000137741 acres.

Is the square feet to acres conversion exact?

Yes. The relationship is fixed by definition, so 0.000022956841 is an exact conversion factor — only the displayed result is rounded.

Square Feet to Acres Converter

Convert square feet to acres instantly with this free square feet to acres converter. Enter any value to get an accurate area conversion, plus the formula, the conversion factor and a full reference table.

What is 1 square foot in acres?

1 square foot is equal to 0.000022957 acres.

1 ÷ 43,560 = 0.000022957 acres

Amount

Result0.0000229568

1 square foot = 0.0000229568 acres

Square feet to Acres formula

ac = ft² ÷ 43,560

The square feet to acres conversion factor is 0.000022956841, which is exact by definition. 1 square foot = 0.000022956841 acres, and 1 acre = 43,560 square feet.

Worked examples

2 square feet = 0.000045914 acres — 2 ÷ 43,560 = 0.000045914 acres
6 square feet = 0.000137741 acres — 6 ÷ 43,560 = 0.000137741 acres
10 square feet = 0.000229568 acres — 10 ÷ 43,560 = 0.000229568 acres

Square feet to Acres conversion table

Every value below is calculated with the exact conversion factor and rounded for display.

square feet to acres conversion table
Square feet (ft²)	Acres (ac)
1 ft²	0.00002296 ac
2 ft²	0.00004591 ac
3 ft²	0.00006887 ac
4 ft²	0.00009183 ac
5 ft²	0.00011478 ac
6 ft²	0.00013774 ac
7 ft²	0.0001607 ac
8 ft²	0.00018365 ac
9 ft²	0.00020661 ac
10 ft²	0.00022957 ac
12 ft²	0.00027548 ac
15 ft²	0.00034435 ac
20 ft²	0.00045914 ac
25 ft²	0.00057392 ac
30 ft²	0.00068871 ac
50 ft²	0.00114784 ac
75 ft²	0.00172176 ac
100 ft²	0.00229568 ac
500 ft²	0.01147842 ac
1,000 ft²	0.02295684 ac

When you need to convert square feet to acres

Comparing property and land listings, which use square feet in the US and square metres almost everywhere else.
Estimating flooring, turf or paint coverage from a supplier's spec.
Reading farm or plot sizes given in acres or hectares.

Getting a feel for the scale

A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.

Acre (ac)

An acre is roughly a US football field without the end zones

Common mistakes to avoid

Dividing when you should multiply. Because 1 square foot = 0.000023 acres, the answer should be smaller than the number you started with.
Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.

How precise does the answer need to be?

Round only at the end, and only to the precision your task actually needs. The converter above keeps full double precision internally and rounds for display.

How these units are defined

Square foot (ft²): The dominant US unit for floor area and real estate. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Acre (ac): 43,560 square feet; the standard land-area unit in the US and UK. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.

Frequently asked questions

What is 1 square foot in acres?: 1 square foot is equal to 0.000022957 acres.
How many square feet are in one acre?: There are 43,560 square feet in 1 acre.
How do you convert square feet to acres?: Multiply the number of square feet by 0.000022957 — or use the formula ac = ft² ÷ 43,560.
What is 6 square feet in acres?: 6 square feet is 0.000137741 acres. 6 ÷ 43,560 = 0.000137741 acres.
Is the square feet to acres conversion exact?: Yes. The relationship is fixed by definition, so 0.000022956841 is an exact conversion factor — only the displayed result is rounded.