Square Feet to Acres Conversion

Enter the area in square feet below to get the value converted to acres.

SWAP UNITS
Results in Acres:
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43,560 sq ft = 1 ac

How to Convert Square Feet to Acres

Calculators can be used to convert measurements from one unit to another

To convert a square foot measurement to an acre measurement, divide the area by the conversion ratio. One acre is equal to 43,560 square feet, so use this simple formula to convert:

acres = square feet ÷ 43,560

The area in acres is equal to the square feet divided by 43,560.

For example, here's how to convert 50,000 square feet to acres using the formula above.
50,000 sq ft = (50,000 ÷ 43,560) = 1.147842 ac

Square feet and acres are both units used to measure area. Keep reading to learn more about each unit of measure.

Square Feet

One square foot is equal to the area of a square with sides that are 1 foot in length.[1] One square foot is roughly equivalent to 144 square inches.

The square foot is a US customary and imperial unit of area. A square foot is sometimes also referred to as a square ft. Square feet can be abbreviated as sq ft, and are also sometimes abbreviated as ft². For example, 1 square foot can be written as 1 sq ft or 1 ft².

Try our square footage calculator to calculate the area of a space.

Acres

One acre is defined as the area equal to a space that is one chain (66 ft) by one furlong (660 ft), or 10 square chains.[2] That's equal to 43,560 square feet for those unfamiliar with those units of measure.

The acre is a US customary and imperial unit of area. Acres can be abbreviated as ac; for example, 1 acre can be written as 1 ac.

Try our acreage calculator to find the area of a plot of land in acres by locating the boundaries on a map.

Square Foot to Acre Conversion Table

Square foot measurements converted to acres
Square Feet Acres
1 sq ft 0.000022957 ac
2 sq ft 0.000045914 ac
3 sq ft 0.000068871 ac
4 sq ft 0.000091827 ac
5 sq ft 0.000115 ac
6 sq ft 0.000138 ac
7 sq ft 0.000161 ac
8 sq ft 0.000184 ac
9 sq ft 0.000207 ac
10 sq ft 0.00023 ac
100 sq ft 0.002296 ac
1,000 sq ft 0.022957 ac
10,000 sq ft 0.229568 ac
100,000 sq ft 2.2957 ac

References

  1. Merriam-Webster, square foot, https://www.merriam-webster.com/dictionary/square%20foot
  2. National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.44-2019.pdf