Micrometers to Millimeters Converter

1 µm = 0.001 mm. Type any value below for the exact millimeters figure.

µm
1mm

1,000 µm = 1 mm

Conversion summary

1 µm = 0.001 mm

Formula
Millimeter = Micrometer ÷ 1,000
Category
Length
Units
µm → mm

1,000 µm in other units

Values update with the converter above. Select a row to open that conversion's detailed page.

Metric

US / Imperial

  • Foot0.00328084 ft
  • Inch0.03937008 in
  • Yard0.001093613 yd
  • Mile0.0000006213712 mi
  • Furlong0.00000497097 fur
  • Nautical mile0.0000005399568 nmi
  • Fathom0.0005468066 ftm

Traditional and regional

  • Scandinavian mile0.0000001 mil
  • Arshin0.001470588 arshin
  • Endaze0.001538462 endaze
  • Byzantine Foot0.00317662 pus
  • Byzantine Fathom0.0005294367 orgyia
  • Cig0.003003003 cig

Scientific

  • Astronomical Unit6.68459E-15 AU
  • Light-year1.057E-19 ly
  • Parsec3.24078E-20 pc
  • Angstrom10,000,000 Å

How do you convert micrometers to millimeters?

To convert micrometers to millimeters, divide the number of micrometers by 1,000. 1 µm = 0.001 mm.

Conversion formula

Millimeter = Micrometer ÷ 1,000

Micrometers to millimeters conversion table

Micrometers (µm)Millimeters (mm)
1 µm0.001 mm
10 µm0.01 mm
50 µm0.05 mm
100 µm0.1 mm
500 µm0.5 mm
1,000 µm1 mm
10,000 µm10 mm

What is Micrometer?

Micrometer is a length unit used to express distance, size or travel range in practical measurement work.

Short history of Micrometer

The prefix micro- (one millionth, from Greek mikros, small) was formally adopted with the SI in 1960; the micrometer (often called a micron) is used for cell sizes, fiber diameters and machining tolerances.

Open the Micrometer unit guide

What is Millimeter?

The millimeter is a unit of length equal to one thousandth of a meter. It is widely used in technical and precision work.

Short history of Millimeter

The millimeter became especially important as manufacturing and engineering required tighter tolerances and repeatable precision.

Open the Millimeter unit guide

Frequently asked questions

What is 1 Micrometer in Millimeter?

1 µm = 0.001 mm.

How do you convert Micrometer to Millimeter?

To convert micrometers to millimeters, divide the number of micrometers by 1,000. 1 µm = 0.001 mm.

Frequently asked questions

How many millimeters are in 1 micrometer?

1 µm = 0.001 mm.

How do you convert micrometers to millimeters?

To convert micrometers to millimeters, divide the number of micrometers by 1,000. 1 µm = 0.001 mm.

How many micrometers are in 1 millimeter?

1 mm = 1,000 µm.

Sources

  1. BIPM: The International System of Units (SI Brochure)
  2. NIST: SI Units – Length
  3. NIST: Guide for the Use of the International System of Units

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