Square kilometer (km²)
One million square meters, used for regions and cities.
Result
1 square kilometer = 10,000,000,000 square centimeters
Square kilometer at a glance
| Unit name | Square kilometer (plural: square kilometers) |
|---|---|
| Symbol | km² |
| Quantity measured | Area |
| Measurement system | Metric |
| Also known as | sq km, km2, square kilometre |
| Definition exact? | Yes — exact by definition |
1 square kilometer in other area units
| Unit | 1 km² equals |
|---|---|
| Square millimeter | 1,000,000,000,000 mm² |
| Square centimeter | 10,000,000,000 cm² |
| Square meter | 1,000,000 m² |
| Square inch | 1,550,003,100 in² |
| Square foot | 10,763,910.4 ft² |
| Square yard | 1,195,990.05 yd² |
| Square mile | 0.386102159 mi² |
| Acre | 247.105381 ac |
| Hectare | 100 ha |
| Are | 10,000 a |
| Square nautical mile | 0.29155335 sq nmi |
| Barn | 1 × 10³⁴ b |
Frequently asked questions
- What is a square kilometer?
- One million square meters, used for regions and cities.
- What is the symbol for the square kilometer?
- The symbol for the square kilometer is km². It measures area.
- How many square centimeters are in a square kilometer?
- 1 square kilometer = 10,000,000,000 square centimeters.
- How many square meters are in a square kilometer?
- 1 square kilometer = 1,000,000 square meters.
- How many square inches are in a square kilometer?
- 1 square kilometer = 1,550,003,100 square inches.