Micrometers to Millimeters Converter
Convert micrometers (µm) to millimeters (mm)
Result
0.001 mm
Millimeters
1 µm = 0.001 mm
1 µm in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How to convert micrometers to millimeters
There are 1,000 micrometers in one millimeter, so divide the number of micrometers by 1,000.
mm = µm ÷ 1,000
1 µm = 0.001 mm · 1 mm = 1,000 µm
Worked example
To convert 5 micrometers to millimeters: 5 µm ÷ 1,000 = 0.005 mm.
About micrometers (µm)
A micrometer (micron) is one millionth of a metre, used for cells, fibres and machining tolerances.
About millimeters (mm)
A millimeter is one thousandth of a metre. Rain, screen sizes and engineering drawings are often measured in millimetres.
More conversions
Micrometers to other units
Frequently asked questions
How many millimeters are in one micrometer?
One micrometer equals 0.001 millimeters.
How many micrometers are in one millimeter?
One millimeter equals 1,000 micrometers.
How do I convert micrometers to millimeters?
Use the formula mm = µm ÷ 1,000. For example, 5 µm ÷ 1,000 = 0.005 mm.