Millimeter To Kilometer Conversion Chart

Millimeter (mm) Kilometer (km)
0.01 mm1e-8 km
0.1 mm1.0000000000000001e-7 km
1 mm0.000001 km
2 mm0.000002 km
5 mm0.000005 km
10 mm0.00001 km
20 mm0.00002 km
50 mm0.00005 km
100 mm0.0001 km
500 mm0.0005 km
1000 mm0.001 km


A millimeter is the smallest unit. There are 10 mm in one centimeter, if an object is smaller than one centimeter, you would use millimeters. A scientist measuring something under a magnifying glass might use millimeters to represent a tiny specimen.


Kilometers are used to measure long distances. If you are looking to figure out the length of a road, the distance between two locations, etc, you would use kilometers.