Square Feet to Acres Calculator
10,000 square feet is 0.2296 acres. To convert, divide the square feet by 43,560. One acre is 43,560 ft², 4,046.8564 m² or 0.4047 hectares.
How to use
- In Convert, type the area and pick its unit: square feet, acres, square meters or hectares.
- Read the result in acres (or square feet if you started from acres), with the other units listed below it.
- If you only know the sides of a rectangular lot, switch to Dimensions, enter length and width in feet, yards or meters, and read the acreage.
How it works
Acres = square feet / 43,560. Square feet = acres x 43,560. This is exact: an acre is defined as 43,560 square feet (660 ft x 66 ft, a furlong by a chain).
Metric: 1 acre = 4,046.8564224 m² = 0.40468564224 hectares, because 1 ft = 0.3048 m exactly, so 1 ft² = 0.09290304 m². 1 hectare = 10,000 m² = 2.4710538 acres.
From dimensions: area = length x width, converted to square meters first (1 yd = 0.9144 m), then to the other units.
This tool uses the international foot. The older US survey foot is about 2 parts per million longer, which makes a survey acre 4,046.873 m², a difference of roughly 0.0004%. It is far below what a lot measurement can resolve, but legal descriptions in some US states are written in survey feet, so use the surveyor's figure for a deed.
Square feet to acres
| Square feet | Acres | Square meters |
|---|---|---|
| 1,000 | 0.0230 | 92.9 |
| 5,000 | 0.1148 | 464.5 |
| 7,500 | 0.1722 | 696.8 |
| 10,000 | 0.2296 | 929.0 |
| 20,000 | 0.4591 | 1,858.1 |
| 43,560 | 1 | 4,046.9 |
| 50,000 | 1.1478 | 4,645.2 |
Common lot sizes in square feet
| Acres | Square feet | Square meters | Hectares |
|---|---|---|---|
| 1/8 | 5,445 | 505.9 | 0.0506 |
| 1/4 | 10,890 | 1,011.7 | 0.1012 |
| 1/2 | 21,780 | 2,023.4 | 0.2023 |
| 1 | 43,560 | 4,046.9 | 0.4047 |
| 5 | 217,800 | 20,234.3 | 2.0234 |
| 10 | 435,600 | 40,468.6 | 4.0469 |
How big is an acre?
A square acre is about 208.71 ft (63.61 m) on a side. An acre is also 4,840 square yards and 1/640 of a square mile. A football field between the goal lines (300 x 160 ft) is about 1.10 acres, and with both end zones (360 x 160 ft) about 1.32 acres.
Sources: NIST SP 811 Appendix B.8 (area, length)Last reviewed 2026-10-16
FAQ
How many square feet are in an acre?
43,560 square feet. That is exact by definition, and equals 4,840 square yards or 4,046.8564224 square meters.
How do I convert square feet to acres?
Divide by 43,560. For example, 10,000 sq ft / 43,560 = 0.2296 acres, and a 7,500 sq ft lot is 0.1722 acres.
How do I convert acres to square feet?
Multiply by 43,560. Half an acre is 21,780 sq ft and a quarter acre is 10,890 sq ft. In the calculator choose acres as the unit and the result shows square feet.
How many acres is a lot measured in length and width?
Multiply length by width in feet and divide by 43,560. A lot 100 ft by 200 ft is 20,000 sq ft, or 0.4591 acres. Use the Dimensions mode to do this directly, including in yards or meters.
How many acres are in a hectare?
1 hectare is 2.4710538 acres, and 1 acre is 0.4046856 hectares. A hectare is 10,000 square meters.
Does this work for irregular lots?
It converts whatever area you enter. For a lot that is not a rectangle, take the area from the plat or survey, or split the lot into rectangles and triangles and add the areas first. Do not rely on a quick conversion for a sale or a boundary dispute, use the surveyed figure.