25 units · base unit m² · L²
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Watch the prefixes: a square kilometer is a million square meters, not a thousand. Every prefixed unit below is squared correctly.
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Show this value in all 25 area units
- Square kilometers km² 1
- Square hectometers hm² 100
- Square decameters dam² 10 000
- Square meters m² 1 000 000
- Square decimeters dm² 100 000 000
- Square centimeters cm² 10 000 000 000
- Square millimeters mm² 1 000 000 000 000
- Square micrometers µm² 1e+18
- Square nanometers nm² 1e+24
- Hectares ha 100
- Ares a 10 000
- Decares daa 1000
- Square inches in² 1 550 003 100.01
- Square feet ft² 10 763 910.4167
- Square yards yd² 1 195 990.0463
- Square miles mi² 0.386 102 158 542
- Acres ac 247.105 381 467
- Roods ro 988.421 525 869
- Square rods rd² 39 536.861 034 7
- Sections section 0.386 102 158 542
- Townships twp 0.010 725 059 959 5
- Roofing squares sq 107 639.104 167
- Circular mils cmil 1 973 525 241 390 000
- Barns b 1e+34
- Tsubos 坪 302 500
Every row is Square kilometer (km²) converted through the square meter, in exact rational arithmetic.
Common area conversions
- km² → m²
- km² → cm²
- km² → mm²
- km² → ha
- km² → in²
- km² → ft²
- km² → mi²
- km² → ac
- m² → km²
- m² → cm²
- m² → mm²
- m² → ha
- m² → in²
- m² → ft²
- m² → mi²
- m² → ac
- cm² → km²
- cm² → m²
- cm² → mm²
- cm² → ha
- cm² → in²
- cm² → ft²
- cm² → mi²
- cm² → ac
- mm² → km²
- mm² → m²
- mm² → cm²
- mm² → ha
- mm² → in²
- mm² → ft²
- mm² → mi²
- mm² → ac
- ha → km²
- ha → m²
- ha → cm²
- ha → mm²
- ha → in²
- ha → ft²
- ha → mi²
- ha → ac
- in² → km²
- in² → m²
- in² → cm²
- in² → mm²
- in² → ha
- in² → ft²
- in² → mi²
- in² → ac
- ft² → km²
- ft² → m²
- ft² → cm²
- ft² → mm²
- ft² → ha
- ft² → in²
- ft² → mi²
- ft² → ac
- mi² → km²
- mi² → m²
- mi² → cm²
- mi² → mm²
All area units
Each unit expressed in square meters (m²), the unit everything in this category converts through.
| Unit | Symbol | System | Value in m² |
|---|---|---|---|
| Square kilometer | km² | metric | 1000000 |
| Square hectometer | hm² | metric | 10000 |
| Square decameter | dam² | metric | 100 |
| Square meter | m² | SI | 1 |
| Square decimeter | dm² | metric | 0.01 |
| Square centimeter | cm² | metric | 0.0001 |
| Square millimeter | mm² | metric | 0.000001 |
| Square micrometer | µm² | metric | 0.000000000001 |
| Square nanometer | nm² | metric | 0.000000000000000001 |
| Hectare | ha | metric | 10000 |
| Are | a | metric | 100 |
| Decare | daa | metric | 1000 |
| Square inch | in² | imperial | 0.00064516 |
| Square foot | ft² | imperial | 0.09290304 |
| Square yard | yd² | imperial | 0.83612736 |
| Square mile | mi² | imperial | 2589988.11034 |
| Acre | ac | imperial | 4046.8564224 |
| Rood | ro | imperial | 1011.7141056 |
| Square rod | rd² | imperial | 25.29285264 |
| Section | section | us | 2589988.11034 |
| Township | twp | us | 93239571.9721 |
| Roofing square | sq | us | 9.290304 |
| Circular mil | cmil | us | 0.000000000506707479097 |
| Barn | b | atomic | 0.0000000000000000000000000001 |
| Tsubo | 坪 | other | 3.30578512397 |
About area units
Convert square meters, square feet, acres, hectares and land-survey area units.
Watch the prefixes: a square kilometer is a million square meters, not a thousand. Every prefixed unit below is squared correctly.
Dimensional formula: L². Every conversion on this page goes through the square meter, using exact fractions rather than decimal approximations. Read how that works →