Convert mm to km
Millimeters to kilometers. Enter a value to convert, or use the mm to km chart further down the page.
1 millimeter equals 0.000001 kilometers. Going the other way, 1 kilometer = 1,000,000 millimeters.
How to convert mm to km
To convert millimeters to kilometers, multiply the millimeter value by 0.000001. You can also divide by 1000000 to get the same answer.
km = mm × 0.000001
Worked example
Convert 15 mm to kilometers:
15 mm = 0.000015 km
mm to km conversion chart
Use this mm to km table for quick reference without typing anything.
| millimeters (mm) | kilometers (km) |
|---|---|
| 0.01 mm | 1e-8 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 |
| 1,000 mm | 0.001 km |
What is a millimeter?
The millimeter is a metric unit equal to one thousandth of a meter. It is the smallest unit marked on a standard metric ruler and is the working unit of engineering drawings, machining tolerances and rainfall measurement.
What is a kilometer?
The kilometer is one thousand meters and is the standard unit for road distances and long-range measurement almost everywhere outside the United States and the United Kingdom.
Frequently asked questions
How many km are in a millimeter?
1 mm equals 0.000001 km. Going the other way, 1 km is 1,000,000 mm.
How do you convert mm to km?
To convert millimeters to kilometers, multiply the millimeter value by 0.000001. You can also divide by 1000000 to get the same answer.
What is 10 mm in km?
10 mm equals 0.00001 km. The conversion chart on this page lists the other values people look up most often.
Related length conversions
Convert mm to other units
- km to mm
- mm to cm
- mm to meters
- mm to inches
- mm to feet
- mm to yards
- mm to miles
- mm to micrometers
- mm to nanometers
Convert other units to km
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