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Square foot to Acre Converter

Type a value — the answer appears instantly. 1 ft² = 0.0000229568 ac.

Reviewed by the OmniCalc teamMethod verified 2026-07-01

From unit

To unit
Result

0.0000229568 acres

= 0.092903 m²= 0.0000092903 ha

equals 0.0000229568 acres

Formula: ac = ft² × 0.000022956841

Square foot to Acre formula

ac = ft² × 0.000022956841

Convert 5 square feet to acres

  1. Start with 5 square feet.
  2. Multiply by the conversion factor: 5 × 0.0000229568 = 0.0001147842.
  3. So 5 ft² = 0.0001147842 ac.

Square foot to Acre conversion table

Square foot to Acre conversion table
Square feet (ft²)Acres (ac)
0.01 ft²0.0000002296 ac
0.1 ft²0.0000022957 ac
0.25 ft²0.0000057392 ac
0.5 ft²0.0000114784 ac
1 ft²0.0000229568 ac
2 ft²0.0000459137 ac
3 ft²0.0000688705 ac
4 ft²0.0000918274 ac
5 ft²0.0001147842 ac
6 ft²0.000137741 ac
7 ft²0.0001606979 ac
8 ft²0.0001836547 ac
9 ft²0.0002066116 ac
10 ft²0.0002295684 ac
15 ft²0.0003443526 ac
20 ft²0.0004591368 ac
25 ft²0.000573921 ac
30 ft²0.0006887052 ac
40 ft²0.0009182736 ac
50 ft²0.001147842 ac
75 ft²0.001721763 ac
100 ft²0.002295684 ac
250 ft²0.00573921 ac
500 ft²0.01147842 ac
1,000 ft²0.02295684 ac
5,000 ft²0.1147842 ac
10,000 ft²0.2295684 ac

Unit definitions

What is a square foot?

The square foot is the area of a one-foot square, exactly 0.09290304 square metres. It is the dominant unit for real estate, floor plans, and rent in the United States. One square metre is about 10.76 square feet.

What is a acre?

The acre is exactly 4840 square yards, about 4046.86 square metres or 0.405 hectares. It is the traditional unit for land area in the United States and United Kingdom. An acre was historically the area a yoke of oxen could plough in a day.

Frequently asked questions

How many acres are in one square foot?

One square foot equals 0.0000229568 acres (1 ft² = 0.0000229568 ac).

How do I convert square feet to acres?

Multiply the value in square feet by 0.0000229568. For example, 10 ft² × 0.0000229568 = 0.0002295684 ac.

Which is bigger — a square foot or a acre?

A acre is bigger: one acre contains 43,560 square feet.

Is this square foot to acre converter free?

Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.

Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.