Convert Millimeters to Kilometers
One millimeter equals 0.000001 kilometers. Type any value to convert millimeters to kilometers instantly — with a full reference table below.
Convert Millimeters to Kilometers
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Conversion formula
To convert millimeters to kilometers, multiply by 0.000001. One millimeter equals 0.000001 km, and one kilometer equals 1,000,000 mm.
Millimeters to Kilometers table
About converting Millimeters to Kilometers
Millimeters (mm) and Kilometers (km) are both units of length. The exact factor is 1 mm = 0.000001 km, so multiply by 0.000001 to go from millimeters to kilometers (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Kilometers to Millimeters converter, or the full unit converter for every unit at once.
Frequently asked questions
How many kilometers are in one millimeter?
One millimeter equals 0.000001 kilometers.
How do I convert millimeters to kilometers?
Multiply the number of millimeters by 0.000001. For example, 10 millimeters = 0.00001 kilometers.
What is 5 millimeters in kilometers?
5 millimeters is 0.000005 kilometers.