Type a land area in acres and get square feet at once, or switch direction to turn ft² into acres. Square meters, hectares and square yards are shown too.
Uses the exact factor 1 acre = 43,560 ft². Runs in your browser. Nothing you type is sent anywhere.
This acres to square feet converter is for home buyers, farmers, surveyors and students who need to compare plot sizes. Land listings in the US and UK often give acres, while house plans, zoning rules and building quotes use square feet. The tool uses the exact international factor, so 1 acre is always 43,560 ft² with no rounding.
How Many Square Feet Are in an Acre?
There are exactly 43,560 square feet in one acre. To convert acres to square feet, multiply the acres by 43,560. For example, 2.5 acres × 43,560 = 108,900 ft². To go the other way, divide square feet by 43,560, so a 10,000 ft² lot is about 0.23 acres, or 929.03 square meters.
Why Is an Acre 43,560 Square Feet?
An acre is 43,560 square feet because it was defined as an area 1 furlong long and 1 chain wide, which is 660 ft × 66 ft = 43,560 ft².
The acre comes from the medieval English idea of the land a team of oxen could plough in a day. The Gunter’s chain, 66 feet long, was the surveyor’s tool, and an acre is 10 square chains. Today the foot is the international foot of exactly 0.3048 m, so one acre is exactly 4,046.8564224 square meters. An acre has no fixed shape: a square acre is about 208.71 ft on each side.
ft² = acres × 43,560
acres = ft² ÷ 43,560
1 acre = 4,046.8564224 m² = 0.40468564224 ha
The US survey acre, based on the old US survey foot, is about 0.016 m² larger. NIST retired the survey foot for new work at the end of 2022, and the difference never shows at normal precision.
What Is the Acres to Square Feet Chart for Common Plot Sizes?
Values from this tool. Square meters and hectares are rounded:
| Acres | Square feet | Square meters | Hectares |
|---|---|---|---|
| 0.1 | 4,356 | 404.69 | 0.0405 |
| 0.25 | 10,890 | 1,011.71 | 0.1012 |
| 0.5 | 21,780 | 2,023.43 | 0.2023 |
| 1 | 43,560 | 4,046.86 | 0.4047 |
| 2 | 87,120 | 8,093.71 | 0.8094 |
| 5 | 217,800 | 20,234.28 | 2.0234 |
| 10 | 435,600 | 40,468.56 | 4.0469 |
| 40 | 1,742,400 | 161,874.26 | 16.1874 |
| 100 | 4,356,000 | 404,685.64 | 40.4686 |
| 640 (1 sq mile) | 27,878,400 | 2,589,988.11 | 258.9988 |
How Do You Convert Square Feet to Acres?
Divide the square feet by 43,560 to get acres, so a 10,000 ft² lot is 10,000 ÷ 43,560 = 0.2296 acres.
To find the square feet of a plot first, measure the length and width in feet and multiply them; the square footage calculator also handles L shapes and circles. In Pakistan and India land is often sold in marla and kanal, and the marla to square feet converter turns those into ft², which you can then turn into acres here. For metric plans, the square feet to square meters converter gives m² directly.
Worked Example
A buyer is looking at a 2.5 acre rural plot and a builder quotes per square foot. Type 2.5 with acres to ft² selected: the tool shows 108,900 ft², and below it 10,117.14 square meters, 1.0117 hectares and 12,100 square yards. A neighbour’s suburban lot is 10,000 ft²; switch to ft² to acres and type 10000 to see 0.23 acres (0.2296 with 4 decimal places). The rural plot is almost 11 times larger.
How Do You Use the Acres to Square Feet Converter?
Pick a direction
Choose acres to ft², or ft² to acres if your number is in square feet.
Type the area
Enter the land area. Decimals like 2.5 and commas like 10,000 both work.
Choose decimal places
Use 0 for square feet, or 2 to 4 for small fractions of an acre.
Read all the units
The big number is the answer. Square meters, hectares and square yards show below.
Frequently Asked Questions
How many square feet is half an acre?
Half an acre is 21,780 square feet. Multiply 0.5 by 43,560. That is about 2,023 square meters, or a square plot roughly 147.6 feet on each side.
How big is an acre compared with a football field?
An American football field, 360 ft by 160 ft including both end zones, covers 57,600 ft², which is about 1.32 acres. So one acre is about three quarters of a field with its end zones.
How many acres is 1,000,000 square feet?
One million square feet is about 22.96 acres. Divide 1,000,000 by 43,560 to get 22.9568 acres, which is also about 9.29 hectares. A large warehouse or shopping centre can cover that much floor area.
What are the side lengths of a square acre?
A square acre is about 208.71 feet on each side, because the square root of 43,560 is 208.71. In metric that is about 63.61 meters per side.
Is an acre the same size in the UK and US?
Yes. Both use the international acre of exactly 43,560 ft², or 4,046.8564224 m². The old US survey acre was larger by only about 0.016 square meters, too small to matter for a normal plot.
How many square feet are in a square mile?
A square mile is 27,878,400 square feet, which is exactly 640 acres. One mile is 5,280 feet, and 5,280 × 5,280 = 27,878,400. In metric, a square mile is about 259 hectares.
Sources and Further Reading
- NIST Guide to the SI, Appendix B.9: conversion factors for area
- NIST Handbook 44, Appendix C: General Tables of Units of Measurement
- NIST: The U.S. survey foot and the international foot
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Last reviewed: October 2026