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The kilometer (SI symbol: km) or kilometre (British spelling) is a unit of length in the metric system, equal to 1000 meters (kilo- being the SI prefix for 1000). It is ..more definition+
In relation to the base unit of [length] => (meters), 1 Kilometers (km) is equal to 1000 meters, while 1 Earth Circumference (Ec) = 40000000 meters.| 18 Kilometers | to common length units |
|---|---|
| 18 km | = 18000 meters (m) |
| 18 km | = 18 kilometers (km) |
| 18 km | = 1800000 centimeters (cm) |
| 18 km | = 59055.118110236 feet (ft) |
| 18 km | = 708661.41732283 inches (in) |
| 18 km | = 19685.039370079 yards (yd) |
| 18 km | = 11.184681460272 miles (mi) |
| 18 km | = 1.9025472994398E-12 light years (ly) |
| 18 km | = 68031504.63389 pixels (PX) |
| 18 km | = 1.125E+39 planck length (pl) |