About the Square Feet to Acres Converter
This square feet to acres converter turns a lot, yard or building area in square feet into acres — or works the other way, from acres to square feet. It also shows the same area in hectares, square meters and square yards, so you can compare listings and plans written in different units.
Home buyers use it to understand lot sizes on real estate listings, landowners and farmers to check parcel areas, builders to compare a building footprint with the size of the land, and gardeners to see what share of an acre their yard covers.
An acre is defined as 43,560 square feet — for example a plot 66 ft by 660 ft (one chain by one furlong). An acre does not have to be square; any shape with that area counts. A square acre would be about 208.7 ft on each side.
How to use the square feet to acres converter
- 1Enter the area.
- 2Choose square feet → acres or acres → square feet.
- 3Read the result, plus hectares, square meters and square yards.
- 4Use the equal-area square side to picture the size.
Formula and method
An acre is 43,560 square feet, which is 4,840 square yards or one-640th of a square mile. Divide square feet by 43,560 to get acres, or multiply acres by 43,560 to get square feet.
Metric figures use the international foot (exactly 0.3048 m), so 1 sq ft = 0.09290304 m² and 1 acre = 4,046.86 m² = 0.404686 ha. Since 2023 US surveying uses the international foot as well; the old US survey foot made an acre larger by only about 4 parts per million. The equal-area square side is the square root of the area.
- sq ft
- Square feet
- acres
- Acres (43,560 sq ft each)
Worked examples
A 10,000 sq ft suburban lot
10,000 ÷ 43,560 = 0.2296 acres — a little under a quarter acre, or 929 m².
2.5 acres to square feet
2.5 × 43,560 = 108,900 sq ft, which is 12,100 sq yd or just over 1 hectare.
One acre in square feet
43,560 sq ft is exactly 1 acre. Laid out as a square, each side would be √43,560 ≈ 208.7 ft.
Frequently asked questions
How many square feet are in an acre?+
One acre is exactly 43,560 square feet. Half an acre is 21,780 sq ft and a quarter acre is 10,890 sq ft.
How do I convert square feet to acres?+
Divide the square footage by 43,560. For example, a 15,000 sq ft lot is 15,000 ÷ 43,560 = 0.344 acres.
How big is an acre in feet?+
A square acre is about 208.7 ft by 208.7 ft. The traditional shape was one furlong (660 ft) by one chain (66 ft), and any shape with 43,560 sq ft is an acre.
How many acres is 1 hectare?+
One hectare (10,000 m²) is about 2.471 acres, or 107,639 square feet. One acre is about 0.4047 hectares.
Is an acre bigger than a football field?+
An American football field including both end zones is 360 × 160 ft = 57,600 sq ft, about 1.32 acres, so an acre is roughly three-quarters of a field.