How do I convert square feet to acres?

Multiply the square foot value by 2.2957 × 10^−5. So x ft² × 2.2957 × 10^−5 = the equivalent in ac.

What is 5 square feet in acres?

5 square feet equals 0.000114784 acres.

What is 10 square feet in acres?

10 square feet equals 0.000229568 acres.

What is 100 square feet in acres?

100 square feet equals 0.00229568 acres.

How do I convert back from acres to square feet?

Multiply the acre value by 43560. For example, 1 ac = 43560 ft².

Is the square foot bigger than the acre?

No. 1 square foot is smaller than 1 acre. It takes 43560 square feet to equal 1 acre.

Are these conversion factors exact?

Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (2.2957 × 10^−5) is exact within IEEE 754 double precision.

Square feet to Acres Converter

1 ft² = 2.2957 × 10^−5 ac (square foot → acre)

1 ft² = 2.2957 × 10^−5 ac

1 square foot equals 2.2957 × 10^−5 acres. To convert square feet to acres, multiply the square foot value by 2.2957 × 10^−5. For quick reference: 1 ft² = 2.2957 × 10^−5 ac, 5 ft² = 0.000114784 ac, 10 ft² = 0.000229568 ac, 100 ft² = 0.00229568 ac.

From

2.2957 × 10^−5

FormulaAcres = Square feet × 2.2957 × 10^−5

Quick

When to use square feet → acres

Square feet to acres divides by 43,560 — the acre's exact definition in square feet (66 × 660 ft). A 10,000 sq ft lot is 0.23 acres; a 21,780 sq ft parcel is exactly half an acre. The 43,560 figure is worth memorising if you deal with US property: listings quote lots under an acre in square feet and larger ones in acres, so comparing across that boundary needs this exact divisor.

How to convert square feet to acres

Take your value
Start with your value in square feet.
Multiply by 2.2957 × 10^−5
Multiply the square foot value by 2.2957 × 10^−5. This is the exact conversion factor from square feet to acres.
Read the result
The product is your value in acres. For example, 5 ft² × 2.2957 × 10^−5 = 0.000114784 ac.

Conversion formula

The exact factor from square feet to acres is 2.2957 × 10^−5.

Acres = Square feet × 2.2957 × 10^−5

Square feet to Acres conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from square feet to acres
Square feet (ft²)	Acres (ac)
0.1 ft²	2.2957 × 10^−6 ac
0.25 ft²	5.7392 × 10^−6 ac
0.5 ft²	1.1478 × 10^−5 ac
1 ft²	2.2957 × 10^−5 ac
2 ft²	4.5914 × 10^−5 ac
3 ft²	6.8871 × 10^−5 ac
4 ft²	9.1827 × 10^−5 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
40 ft²	0.00091827 ac
50 ft²	0.0011478 ac
60 ft²	0.0013774 ac
70 ft²	0.001607 ac
75 ft²	0.0017218 ac
80 ft²	0.0018365 ac
90 ft²	0.0020661 ac
100 ft²	0.0022957 ac
120 ft²	0.0027548 ac
150 ft²	0.0034435 ac
200 ft²	0.0045914 ac
250 ft²	0.0057392 ac
300 ft²	0.0068871 ac
400 ft²	0.0091827 ac
500 ft²	0.011478 ac
600 ft²	0.013774 ac
750 ft²	0.017218 ac
800 ft²	0.018365 ac
1000 ft²	0.022957 ac
1200 ft²	0.027548 ac
1500 ft²	0.034435 ac
2000 ft²	0.045914 ac
2500 ft²	0.057392 ac
3000 ft²	0.068871 ac
4000 ft²	0.091827 ac
5000 ft²	0.11478 ac
7500 ft²	0.17218 ac
10000 ft²	0.22957 ac
20000 ft²	0.45914 ac
50000 ft²	1.1478 ac
100000 ft²	2.2957 ac
1000000 ft²	22.957 ac

Real-world reference

The median new US single-family home is around 2,200 sq ft. A standard two-car garage is 400–600 sq ft.

Frequently asked questions

How many acres are in 1 square foot?: 1 square foot equals 2.2957 × 10^−5 acres.
How do I convert square feet to acres?: Multiply the square foot value by 2.2957 × 10^−5. So x ft² × 2.2957 × 10^−5 = the equivalent in ac.
What is 5 square feet in acres?: 5 square feet equals 0.000114784 acres.
What is 10 square feet in acres?: 10 square feet equals 0.000229568 acres.
What is 100 square feet in acres?: 100 square feet equals 0.00229568 acres.
How do I convert back from acres to square feet?: Multiply the acre value by 43560. For example, 1 ac = 43560 ft².
Is the square foot bigger than the acre?: No. 1 square foot is smaller than 1 acre. It takes 43560 square feet to equal 1 acre.
Are these conversion factors exact?: Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (2.2957 × 10^−5) is exact within IEEE 754 double precision.

About the square foot and the acre

The square foot

The square foot is the standard area unit for US and Canadian real estate, and remains common in UK property listings alongside square meters. One square foot is exactly 0.09290304 m² (derived from 1 ft = 0.3048 m squared). A typical US single-family home is 1,500–2,500 sq ft; a two-car garage is about 400–600 sq ft.

The acre

The acre is the traditional imperial unit for land, still the standard for US and UK property, farmland, and parkland. One acre is exactly 4,046.8564224 m² — historically the area a yoke of oxen could plough in a day, standardised as 1 chain by 1 furlong (66 × 660 feet, or 43,560 square feet). An American football field including end zones is about 1.32 acres.

Acres to Square feet

ac → ft²

Square meters to Square feet

m² → ft²

Square meters to Acres

m² → ac

Square meters to Hectares

m² → ha

Square meters to Square kilometers

m² → km²

Square meters to Square miles

m² → mi²