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Millimeters to Kilometers Converter

Convert millimeters (mm) to kilometers (km), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Convert a length from one unit to another. For inches, feet and yards you also get feet and inches with a tape-measure fraction.

About valueEnter a number, a fraction such as 3/8, a mixed number such as 1 3/8, or simple arithmetic such as 2*3.
About to unitUnit to convert into.
About round inches to nearestSmallest inch fraction used when showing feet and inches.
Result
Result
1 × 10^-6 km
miles
6.21371192237 × 10^-7
yards
0.00109361329834
feet
0.00328083989501
inches
0.0393700787402
meters
0.001
centimeters
0.1
micrometers
1000
nanometers
1000000
light-years
1.05700083402 × 10^-19
US survey feet
0.00328083333333

1 mm = 1 × 10^-6 km

Show the working
  1. 1 mm = 1e-6 km
  2. 1 × 1e-6 = 1e-6 km

How to convert millimeters to kilometers

1 mm = 1 × 10^-6 km, so multiply by 1 to go from millimeters to kilometers. Going the other way, 1 km = 1000000 mm.

km = mm × 1
mm = km × 1000000

Worked example:

1 mm = 1e-6 km
5 × 1e-6 = 5e-6 km

Millimeters to kilometers table

MillimetersKilometers
1 mm1 × 10^-6 km
2 mm2 × 10^-6 km
3 mm3 × 10^-6 km
4 mm4 × 10^-6 km
5 mm5 × 10^-6 km
6 mm6 × 10^-6 km
7 mm7 × 10^-6 km
8 mm8 × 10^-6 km
9 mm9 × 10^-6 km
10 mm1 × 10^-5 km
15 mm1.5 × 10^-5 km
20 mm2 × 10^-5 km
25 mm2.5 × 10^-5 km
30 mm3 × 10^-5 km
40 mm4 × 10^-5 km
50 mm5 × 10^-5 km
75 mm7.5 × 10^-5 km
100 mm0.0001 km
250 mm0.00025 km
500 mm0.0005 km
1000 mm0.001 km

About the units

Millimeters (mm)
Millimeters, a metric unit. Definition: BIPM SI Brochure (SI prefixes).
Kilometers (km)
Kilometers, a metric unit. Definition: BIPM SI Brochure (SI prefixes).

Formula version 0.1.0Reviewed