Convert Millimeters to Kilometers

Enter your millimeter value in the form below to get the value calculated in kilometers.

Results in Kilometers:

1 mm = 1.0E-6 km

How to Convert Millimeters to Kilometers Using an Easy Conversion Formula

Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

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Convert millimeters to kilometers with this simple formula:

kilometers = millimeters × 1.0E-6

Converting a millimeter length measurement to a kilometer measurement involves multiplying your length by the conversion ratio to find the result. A millimeter is equal to 1.0E-6 kilometers, so to convert simply multiply by 1.0E-6.

For example:

5 mm = (5 × 1.0E-6) = 5.0E-6 km

Our inch fraction calculator can add millimeters and kilometers together and it also automatically converts the results to both imperial and metric values.

Millimeters and kilometers are both units used to measure length. Learn more about length and find more length measurement conversion calculators. A millimeter is a metric measurement and can be abbreviated as mm, for example 1 mm. A kilometer is a metric measurement and can be abbreviated as km, for example 1 km. Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

Millimeter is spelled millimetre internationally, and it is equal in length to .1 centimeters, 1000 micrometers, or ⁵/₁₂₇ inch. They are represented by the smallest ticks on most metric rulers. To get a reference point of the size, the thickness of a dime is 1.35mm.

To get an idea of how small a millimeter is, a dime is 1.35mm thick.

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs. If you need a ruler you can also download and print our free printable rulers which include both imperial and metric measurements.

millimeters and kilometers are units used to measure length

Convert Kilometers to Millimeters

Millimeter Measurements and Equivalent Kilometer Conversions

Common millimeter values converted to the equivalent kilometer value
Millimeters	Kilometers
1 mm	0.0000010 km
2 mm	0.0000020 km
3 mm	0.0000030 km
4 mm	0.0000040 km
5 mm	0.0000050 km
6 mm	0.0000060 km
7 mm	0.0000070 km
8 mm	0.0000080 km
9 mm	0.0000090 km
10 mm	0.000010 km
11 mm	0.000011 km
12 mm	0.000012 km
13 mm	0.000013 km
14 mm	0.000014 km
15 mm	0.000015 km
16 mm	0.000016 km
17 mm	0.000017 km
18 mm	0.000018 km
19 mm	0.000019 km
20 mm	0.000020 km
21 mm	0.000021 km
22 mm	0.000022 km
23 mm	0.000023 km
24 mm	0.000024 km
25 mm	0.000025 km
26 mm	0.000026 km
27 mm	0.000027 km
28 mm	0.000028 km
29 mm	0.000029 km
30 mm	0.000030 km
31 mm	0.000031 km
32 mm	0.000032 km
33 mm	0.000033 km
34 mm	0.000034 km
35 mm	0.000035 km
36 mm	0.000036 km
37 mm	0.000037 km
38 mm	0.000038 km
39 mm	0.000039 km
40 mm	0.000040 km