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Micrometer to Millimeter Converter

Convert micrometers (µm) to millimeters (mm). 1 µm = 0.001 mm.

1 µm = 0.001 mm

Millimeter to Micrometer converter

How to convert micrometers to millimeters

1 micrometer is equal to 0.001 millimeters, and 1 millimeter is equal to 1,000 micrometers. To convert, multiply by the conversion factor:

millimeters = micrometers × 0.001
millimeters = micrometers ÷ 1,000

Example: convert 15 µm to mm: 15 × 0.001 = 0.015 mm.

Micrometer to Millimeter conversion table

Micrometer (µm)Millimeter (mm)
0.01 µm0.00001 mm
0.1 µm0.0001 mm
1 µm0.001 mm
2 µm0.002 mm
3 µm0.003 mm
5 µm0.005 mm
10 µm0.01 mm
20 µm0.02 mm
50 µm0.05 mm
100 µm0.1 mm
250 µm0.25 mm
500 µm0.5 mm
1,000 µm1 mm

About the micrometer

A micrometer is one millionth of a meter. It's used to measure cells, bacteria, fibers and the thickness of coatings and films.

Symbol: µm · 1 µm = 0.000001 m · Category: Metric (SI)

About the millimeter

A millimeter is one thousandth of a meter. It's the standard unit in engineering drawings, manufacturing, rainfall and screen and paper sizes.

Symbol: mm · 1 mm = 0.001 m · Category: Metric (SI)

Frequently asked questions

How many millimeters are in a micrometer?

There are 0.001 millimeters in 1 micrometer (µm).

How many micrometers are in a millimeter?

1 millimeter (mm) equals 1,000 micrometers.

How do I convert micrometers to millimeters?

Multiply the length in micrometers by 0.001. For example, 15 µm × 0.001 = 0.015 mm.

How do I convert millimeters to micrometers?

Divide the length in millimeters by 0.001, or multiply it by 1,000. You can also use the Millimeter to Micrometer converter.