Length Converter
Millimeter
Definition: A millimeter (symbol: mm) is a unit of length in the International System of Units (SI). It is defined as 1/1000 of a meter.
History/origin: The milli- prefix is one of many metric prefixes. It indicates one thousandth of the base unit, in this case the meter. The definition of the meter has changed over time, the current definition being based on the distance traveled by the speed of light.
Current use: Millimeters are used to measure very small distances and lengths, often in engineering, manufacturing, and hardware specifications.
Kilometer
Definition: A kilometer (symbol: km) is a unit of length in the metric system, equal to one thousand meters.
History/origin: The kilometer was introduced during the French Revolution as part of the metrication of France.
Current use: Kilometers are the standard unit for expressing distances between geographical locations (roads, flight paths) in most of the world.
Millimeter to Kilometer Conversion Table
| Millimeter [mm] | Kilometer [km] |
|---|---|
| 0.01 mm | 0.00000001 km |
| 0.1 mm | 0.0000001 km |
| 1 mm | 0.000001 km |
| 2 mm | 0.000002 km |
| 3 mm | 0.000003 km |
| 5 mm | 0.000005 km |
| 10 mm | 0.00001 km |
| 20 mm | 0.00002 km |
| 50 mm | 0.00005 km |
| 100 mm | 0.0001 km |
| 1000 mm | 0.001 km |
How to Convert Millimeter to Kilometer
1 mm = 0.000001 km
1 km = 1000000 mm
Example: convert 15 mm to km:
15 mm = 15 × 0.000001 km = 0.000015 km
Did You Know?
- A millimeter is so small that a single sheet of standard paper is about 0.1 millimeters thick.
- A kilometer is approximately equal to 0.621 miles. In ancient Rome, a mile was defined as 1,000 double-steps of a soldier.