Convert Micrometers to Millimeters

Enter your micrometer value in the form below to get the value calculated in millimeters.

Results in Millimeters:

1 µm = 0.001 mm

How to Convert Micrometers to Millimeters 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 micrometers to millimeters with this simple formula:

millimeters = micrometers × 0.001

Converting a micrometer length measurement to a millimeter measurement involves multiplying your length by the conversion ratio to find the result. A micrometer is equal to 0.001 millimeters, so to convert simply multiply by 0.001.

For example:

5µm = (5 × 0.001) = 0.005mm

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

Micrometers and millimeters are both units used to measure length. Learn more about length and find more length measurement conversion calculators. A micrometer is a metric measurement and can be abbreviated as µm, for example 1µm. A millimeter is a metric measurement and can be abbreviated as mm, for example 1mm. 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.

A human hair is 40-50 micrometers thick or 0.000001 meters, making this a very small unit of measure. The micrometer is often referred to as a micron and internationally it is spelled micrometre.

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.

micrometers and millimeters are units used to measure length

Convert Millimeters to Micrometers

Micrometer Measurements and Equivalent Millimeter Conversions

Common micrometer values converted to the equivalent millimeter value
Micrometers	Millimeters	Micrometers	Millimeters	Micrometers	Millimeters
1	0.001	21	0.021	41	0.041
2	0.002	22	0.022	42	0.042
3	0.003	23	0.023	43	0.043
4	0.004	24	0.024	44	0.044
5	0.005	25	0.025	45	0.045
6	0.006	26	0.026	46	0.046
7	0.007	27	0.027	47	0.047
8	0.008	28	0.028	48	0.048
9	0.009	29	0.029	49	0.049
10	0.01	30	0.03	50	0.05
11	0.011	31	0.031	51	0.051
12	0.012	32	0.032	52	0.052
13	0.013	33	0.033	53	0.053
14	0.014	34	0.034	54	0.054
15	0.015	35	0.035	55	0.055
16	0.016	36	0.036	56	0.056
17	0.017	37	0.037	57	0.057
18	0.018	38	0.038	58	0.058
19	0.019	39	0.039	59	0.059
20	0.02	40	0.04	60	0.06