Square Feet to Acres Calculator
Convert square feet to acres or acres to square feet instantly, with square yards, square meters and hectares.
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About the Square Feet to Acres Calculator
An acre equals 43,560 square feet. To convert square feet to acres, divide by 43,560. To convert acres to square feet, multiply by 43,560. This calculator converts both ways and also shows square yards, square meters and hectares, which helps when comparing lot sizes or property listings.
How to use it
- Enter the area and choose the unit you are converting from.
- Press Convert.
- Read the result in acres, square feet, square yards, square meters and hectares.
How to measure a lot
For a rectangular lot, multiply the length by the width in feet to get square feet, then divide by 43,560 for acres. For an irregular lot, split it into rectangles and triangles, add the areas or check the plat map, deed or county assessor record, which list the official acreage. Measure in feet and keep units consistent.
Square feet to acres formula
Acres = square feet ÷ 43,560. A 10,000 sq ft lot is 0.2296 acres. Square feet = acres × 43,560. A half-acre is 21,780 sq ft.
Common lot sizes
| Acres | Square feet |
|---|---|
| 0.1 | 4,356 |
| 0.25 | 10,890 |
| 0.5 | 21,780 |
| 1 | 43,560 |
| 2 | 87,120 |
| 5 | 217,800 |
| 10 | 435,600 |
Frequently asked questions
How many square feet are in an acre?
43,560 square feet.
How do I convert square feet to acres?
Divide the number of square feet by 43,560.
How big is an acre?
About the size of a football field without the end zones, or roughly 208.7 by 208.7 feet if square.
How many acres is 10,000 square feet?
About 0.23 acres.
How many square yards are in an acre?
4,840 square yards.
Last reviewed: November 2026.