Area Converter
Convert square meters, square feet, acres, hectares, square miles, yards, inches, cm and mm with exact factors. 1 acre is 43,560 square feet. How it works
Use the Area Converter
About the Area Converter
1 acre is 43,560 square feet, 4046.856422 m² or 0.4046856422 hectares, and 1 hectare is 2.471053815 acres. This area converter changes any of 11 units into any other with exact factors: square meters, kilometers, centimeters, millimeters, inches, feet, yards and miles, hectares, and the international and US survey acre.
Area conversion factors
| From | To | 1 unit equals |
|---|---|---|
| 1 acre | square feet | 43560 |
| 1 acre | square yards | 4840 |
| 1 acre | square meters | 4046.856422 |
| 1 acre | hectares | 0.4046856422 |
| 1 hectare | acres | 2.471053815 |
| 1 hectare | square meters | 10000 |
| 1 hectare | square feet | 107639.1042 |
| 1 square mile | acres | 640 |
| 1 square mile | square kilometers | 2.58998811 |
| 1 square kilometer | square miles | 0.3861021585 |
| 1 square kilometer | hectares | 100 |
| 1 square foot | square meters | 0.09290304 |
| 1 square meter | square feet | 10.76391042 |
| 1 square yard | square meters | 0.83612736 |
| 1 square meter | square yards | 1.195990046 |
| 1 square foot | square inches | 144 |
| 1 square inch | square centimeters | 6.4516 |
| 1 square centimeter | square inches | 0.15500031 |
Shown to up to 10 significant digits, as the converter shows them. The acre here is the international acre.
International acre and US survey acre
| Area | International acre (m²) | US survey acre (m²) |
|---|---|---|
| 1 acre | 4046.856422 | 4046.87261 |
| 40 acres | 161874.2569 | 161874.9044 |
The US survey acre is 1.000004 international acres, 0.01618747425 m² larger per acre.
Frequently asked questions
- How many square feet are in an acre?
- 43,560 square feet, which is also 4,840 square yards. 640 acres make a square mile.
- How many acres is a hectare?
- 1 hectare is 2.471053815 acres, and 1 acre is 0.4046856422 hectares. 5 acres is 2.023428211 hectares.
- What is the difference between an international acre and a US survey acre?
- Both are 43,560 square feet, but the US survey acre uses the US survey foot of 1200/3937 m, so it is 4046.87261 m² against 4046.856422 m². Over 40 acres the difference is 161874.9044 against 161874.2569 m², about 0.65 m². NIST and the National Geodetic Survey ended the US survey foot from the end of 2022, but older US land records are based on it.
- How do I convert square feet to square meters?
- Multiply by 0.09290304, which is exact. A 2,000 ft² house is 185.80608 m², and 100 m² is 1076.391042 ft².
- How many square centimeters are in a square inch?
- Exactly 6.4516 cm², because an inch is 2.54 cm. A square foot is 144 square inches.
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