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:

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

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