Area conversion: unit selection
The conversion calculator converts to and from acres, hectares, square centimeters, square feet, square inches, square kilometers, square meters, square miles, square millimeters, square yards as well as other less commonly used units (see below). Select what you want to convert from and what you want to convert to. Then press the "Conversion calculator" button.
Area conversion calculator
Area expresses the size of part of a surface, for example the size of a piece of land or of a room.
Units of area supported by the converter:
| Unit | Symbol | Description |
|---|---|---|
| acre | ac | The acre is a unit of measure for surface typically used to express the size of land. |
| acre (survey) | ac | The US Survey acre is the standard acre in the United States and its very slightly different from the international acre. |
| centiare | ca | The centiare is used some countries and is equal to 1 square meter. |
| hectare | ha | The hectare is equal to 1 square hectometer. It's mostly used to measure land. |
| square astronomical unit | au² | This unit of measure is not used. It's made available for completeness. |
| square attometer | am² | Unit of measure from the metric system used to specify area. One square attometer is equal to 1E-036 square meters. |
| square cable | cable² | Unused |
| square centimeter | cm² | Unit of measure from the metric system used to specify area. One square centimeter is equal to 0.0001 square meters. |
| square chain | ch² | Unused |
| square decameter | dam² | Unit of measure from the metric system used to specify area. One square decameter is equal to 100 square meters. |
| square decimeter | dm² | Unit of measure from the metric system used to specify area. One square decimeter is equal to 0.01 square meters. |
| square fathom | fathom² | Unused |
| square femtometer | fm² | Unit of measure from the metric system used to specify area. One square femtometer is equal to 1E-030 square meters. |
| square foot | ft² | One square foot is equal to 144 square inches. |
| square foot (survey) | ft² | One square foot (survey) is equal to 144 square inches (survey). |
| square furlong | fur² | Unused |
| square hand | hh² | Unused |
| square hectometer | hm² | Unit of measure from the metric system used to specify area. One square hectometer is equal to 10000 square meters, |
| square inch | in² | One square international inch is equal to 6.4516 square centimeters. |
| square kilometer | km² | Unit of measure from the metric system used to specify area. One square kilometer is equal to 1000000 square meters, |
| square league (land) | leagues² | Unused |
| square league (sea) | leagues² | Unused |
| square li (Chinese) | li² | Unused |
| square light-year | ly² | Unused. |
| square link | li² | Unused |
| square meter | m² | Metric system unit to specify area. |
| square micrometer | um² | Unit of measure from the metric system used to specify area. One square micrometer is equal to 0.000000000001 square meters. |
| square mil | mil² | The square mil is usually used to measure the section of wires. |
| square mile | mi² | One square mile is equal to 640 acres. |
| square mile (survey) | mi² | One square survey mile is equal to 640 survey acres. |
| square millimeter | mm² | Unit of measure from the metric system used to specify area. One square millimeter is equal to 0.000001 square meters. |
| square nanometer | nm² | Unit of measure from the metric system used to specify area. One square nanometer is equal to 1E-018 square meters. |
| square nautical mile | nmi² | Unused. |
| square picometer | pm² | Unit of measure from the metric system used to specify area. One square picometer is equal to 1E-024 square meters. |
| square rod | rd² | Unused |
| square thou | thou² | Unused |
| square yard | yd² | One square yard is equal to 9 square feet. |