Popular area conversions
Area units
Area measures a two-dimensional surface. The SI unit is the square meter. Property is often measured in square feet, while land uses acres or hectares: one hectare is 10,000 square meters, about 2.471 acres.
| Unit | Symbol | In square meters | Definition |
|---|---|---|---|
| Square millimeter | mm² | 0.000001 m² | |
| Square centimeter | cm² | 0.0001 m² | |
| Square meter | m² | 1 m² | The SI unit of area: a square one meter on each side, about 10.764 square feet. |
| Are | a | 100 m² | One hundred square meters. |
| Hectare | ha | 10,000 m² | Ten thousand square meters, about 2.471 acres. |
| Square kilometer | km² | 1,000,000 m² | |
| Square inch | in² | 0.00064516 m² | |
| Square foot | ft² | 0.09290304 m² | A square one foot on each side: exactly 0.09290304 square meters. |
| Square yard | yd² | 0.83612736 m² | |
| Acre | ac | 4,046.856422 m² | Exactly 43,560 square feet, about 4,047 square meters. |
| Square mile | mi² | 2,589,988.11 m² | Exactly 640 acres, about 2.59 square kilometers. |
Calculate with area
The smart calculator does arithmetic across area units and picks a sensible unit for the answer. Try 30 ft × 40 ft to m².
Questions and answers
Which area units can I convert?
All 11: square millimeters, square centimeters, square meters, ares, hectares, square kilometers, square inches, square feet, square yards, acres, square miles.
What is the SI unit of area?
This converter uses the square meter (m²) as its base unit. Area measures a two-dimensional surface. The SI unit is the square meter. Property is often measured in square feet, while land uses acres or hectares: one hectare is 10,000 square meters, about 2.471 acres.
How big is an acre?
An acre is exactly 43,560 square feet, about 4,047 square meters or 0.405 hectares. A hectare is about 2.471 acres.
How precise are the results?
Factors are the exact legal definitions where one exists (an inch is exactly 2.54 cm, a pound exactly 0.45359237 kg). Results show 10 significant digits by default; the precision menu offers 4 to 15.
Does the area converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.