Convert square feet to acres

One square foot equals 0.00002296 acres. To convert any number of square feet to acres, multiply by 0.00002296.

The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.

Area conversions carry a trap that catches people who are perfectly comfortable with length: the factor is squared. There are 3.28 feet in a metre but 10.76 square feet in a square metre, and using the linear factor is the most common error in property arithmetic. Beyond that, land is measured in whatever the local convention prescribes — acres, hectares, and across South Asia bigha, katha and gaj — so the same plot is routinely described in two units that need reconciling.

square feet to acres formula

To go the other way, use square foot = acre ÷ 0.00002296.

About these units

The square foot remains the standard for property area in the US, India and much of the Middle East. There are 10.764 square feet in a square metre — not 3.28, a mistake that comes from squaring the linear factor only once.

An acre is 43,560 square feet, historically about the area one person could plough in a day with a yoke of oxen. It is still standard in US and UK land dealings.

Square Foot is also written square feet, sq ft, sqft, ft2 and ft^2. Acre is also written acres.

Sources

1. National Bureau of Standards, "Refinement of Values for the Yard and the Pound", Federal Register, 1 July 1959 — the international yard as exactly 0.9144 m and the avoirdupois pound as exactly 0.45359237 kg.