Convert millimeters to kilometers

1 mm = 0.000001 km. Change the amount below, or read the formula and the reference table further down.

1 millimeter equals

0.000001kilometers

1 mm = 0.000001 km

The formula

Millimeters and kilometers both measure length from the same zero, so a single multiplier does the job.

km = mm × 0.000001

Going the other way? Convert kilometers to millimeters.

Millimeters to kilometers table

Common values, rounded for reading.

Millimeters (mm)Kilometers (km)
10.000001
20.000002
30.000003
40.000004
50.000005
60.000006
70.000007
80.000008
90.000009
100.00001
150.000015
200.00002
250.000025
300.00003
400.00004
500.00005
750.000075
1000.0001
2500.00025
5000.0005
1,0000.001

Questions people ask

How many kilometers are in a millimeter?
One millimeter equals 0.000001 kilometers.
How do I convert millimeters to kilometers by hand?
Multiply the number of millimeters by 0.000001. For a rough check, 0 is close enough for most everyday use.
What is 1 millimeter in kilometers?
1 millimeter is 0.000001 kilometers.

Calcuit generates this page from a unit table, so the factors here match every other page on the site.

Cookies on Calcuit
We use essential cookies to remember this choice and, if you sign in, to keep you signed in. Advertising cookies from Google AdSense are optional. They are not set, and the AdSense script is not loaded, unless you accept.