What is a kilometer?
Definition
km
The kilometer (km) is a metric unit equal to 1,000 meters, used worldwide for road distances.
Unit system
Metric
Convert kilometers
All length units
| Unit | Symbol | System |
|---|---|---|
| nanometers | nm | Metric |
| micrometers | μm | Metric |
| millimeters | mm | Metric |
| centimeters | cm | Metric |
| meters | m | Metric |
| kilometers | km | Metric |
| inches | in | Imperial / US |
| feet | ft | Imperial / US |
| yards | yd | Imperial / US |
| miles | mi | Imperial / US |
| nautical miles | nmi | Nautical & Aviation |
| light years | ly | Scientific & Astronomical |