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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 Earth Circumference (Ec) is equal to 40000000 meters, while 1 Kilometers (km) = 1000 meters.| 4 Earth Circumference | to common length units |
|---|---|
| 4 Ec | = 160000000 meters (m) |
| 4 Ec | = 160000 kilometers (km) |
| 4 Ec | = 16000000000 centimeters (cm) |
| 4 Ec | = 524934383.2021 feet (ft) |
| 4 Ec | = 6299212598.4252 inches (in) |
| 4 Ec | = 174978127.73403 yards (yd) |
| 4 Ec | = 99419.390757973 miles (mi) |
| 4 Ec | = 1.6911531550576E-8 light years (ly) |
| 4 Ec | = 604724485634.58 pixels (PX) |
| 4 Ec | = 1.0E+43 planck length (pl) |