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

Convert Millimeters to Kilometers

Convert from millimeters to kilometers with this simple formula:
kilometers = millimeters × 1.0E-6
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1 Millimeter = 1.0E-6 Kilometers

Learn How to Convert Millimeters to Kilometers Using our Conversion Formula

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, 5mm = (5 × 1.0E-6) = 5.0E-6km.

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 1mm. A kilometer is a metric measurement and can be abbreviated as km, for example 1km. 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

More Length Conversions

Convert to Miles Length
1mm is equal to 6.2137E-7 miles
Convert to Yards Length
1mm is equal to 0.001094 yards
Convert to Feet Length
1mm is equal to 0.003281 feet
Convert to Inches Length
1mm is equal to 0.03937 inches
Convert to Meters Length
1mm is equal to 0.001 meters
Convert to Centimeters Length
1mm is equal to 0.1 centimeters
Convert to Micrometers Length
1mm is equal to 1,000 micrometers
Convert to Nanometers Length
1mm is equal to 1,000,000 nanometers

Millimeter Measurements and Equivalent Kilometer Conversions

Common millimeter values converted to the equivalent kilometer value
Millimeters Kilometers Millimeters Kilometers Millimeters Kilometers
1 0.0000010 21 0.000021 41 0.000041
2 0.0000020 22 0.000022 42 0.000042
3 0.0000030 23 0.000023 43 0.000043
4 0.0000040 24 0.000024 44 0.000044
5 0.0000050 25 0.000025 45 0.000045
6 0.0000060 26 0.000026 46 0.000046
7 0.0000070 27 0.000027 47 0.000047
8 0.0000080 28 0.000028 48 0.000048
9 0.0000090 29 0.000029 49 0.000049
10 0.000010 30 0.000030 50 0.000050
11 0.000011 31 0.000031 51 0.000051
12 0.000012 32 0.000032 52 0.000052
13 0.000013 33 0.000033 53 0.000053
14 0.000014 34 0.000034 54 0.000054
15 0.000015 35 0.000035 55 0.000055
16 0.000016 36 0.000036 56 0.000056
17 0.000017 37 0.000037 57 0.000057
18 0.000018 38 0.000038 58 0.000058
19 0.000019 39 0.000039 59 0.000059
20 0.000020 40 0.000040 60 0.000060