Length conversion

Convert Millimeter to Kilometer

1 millimeter (mm) equals 0.000001 kilometer (km). Enter any value below to convert from mm to km.

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1 mm = 0.000001 km

All Length units

From 1 mm
UnitValue
Meter m 0.001
Kilometer km 0.000001
Centimeter cm 0.1
Millimeter mm 1
Micrometer μm 1,000
Nanometer nm 1,000,000
Inch in 0.0393700787
Foot ft 0.0032808399
Yard yd 0.0010936133
Mile mi 0.0000006214
Nautical mile nmi 0.00000054
Light-year ly 1.057000834e-19
Recent conversions
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Formula

mm to km conversion formula

Use this relationship for a direct conversion:

km = mm x 0.000001

Worked example

2 mm = 0.000002 km.

Metric factors and international inch, foot, yard, mile, and nautical mile definitions are exact.

Quick reference

Millimeter to Kilometer table

Millimeter (mm)Kilometer (km)
0.010.00000001
0.10.0000001
10.000001
20.000002
50.000005
100.00001
250.000025
500.00005
1000.0001
1,0000.001

From unit

About the millimeter

One thousandth of a meter.

Symbol: mm

To unit

About the kilometer

One thousand meters.

Symbol: km

Keep converting

Related conversions

Kilometer to MillimeterReverse this conversion Millimeter to Metermm to mMillimeter to Centimetermm to cmMillimeter to Inchmm to inMillimeter to Footmm to ftMillimeter to Yardmm to ydMillimeter to Milemm to mi

Source

Conversion standard

Definitions are checked against NIST SP 811: Guide for the Use of the SI. Calculations use full internal precision before display rounding.

View the complete length converter

Questions

mm to km FAQ

How do you convert millimeter to kilometer?

Use the formula km = mm x 0.000001. 1 millimeter (mm) equals 0.000001 kilometer (km).

Is the mm to km conversion exact?

Both unit definitions use exact factors. Only the displayed decimal may be rounded.