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Convert microns to mm

1 micrometer equals 0.001 millimeters. Enter a value below to convert instantly.

1 µm
0.001 mm

Multiply the number of micrometers by 0.001 to get millimeters. How this is calculated

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Need the other direction? Convert millimeter to micrometer →

Formula

Multiply the number of micrometers by 0.001 to get millimeters.

Step by step

  1. Start with 1 µm.
  2. Multiply by the conversion factor 0.001.
  3. 1 × 0.001 = 0.001 mm.

Micrometers to Millimeters conversion table

Micrometers (µm) Millimeters (mm)
1 0.001
2 0.002
3 0.003
5 0.005
10 0.01
20 0.02
50 0.05
100 0.1
500 0.5
1,000 1

Convert Micrometer to other length units

1 µm expressed in every other length unit on this site.

  • Meter m 0.000001
  • Kilometer km 1e-9
  • Hectometer hm 1e-8
  • Dekameter dam 1e-7
  • Decimeter dm 0.00001
  • Centimeter cm 0.0001
  • Millimeter mm 0.001
  • Nanometer nm 1,000
  • Picometer pm 1,000,000
  • Femtometer fm 1,000,000,000
  • Attometer am 1,000,000,000,000
  • Megameter Mm 1e-12
  • Gigameter Gm 1e-15
  • Terameter Tm 1e-18
  • Petameter Pm 1e-21
  • Exameter Em 1e-24
  • Angstrom Å 10,000
  • Mile mi 6.2137119e-10
  • Yard yd 0.0000010936133
  • Foot ft 0.0000032808399
  • Inch in 0.000039370079
  • Kiloyard kyd 1.0936133e-9
  • League lea 2.0712373e-10
  • Furlong fur 4.9709695e-9
  • Chain ch 4.9709695e-8
  • Rod rd 1.9883878e-7
  • Perch perch 1.9883878e-7
  • Pole pole 1.9883878e-7
  • Rope rope 1.6404199e-7
  • Fathom fath 5.4680665e-7
  • Link li 0.0000049709695
  • Hand hand 0.0000098425197
  • Ell ell 8.7489064e-7
  • Barleycorn barleycorn 0.00011811024
  • Mil mil 0.039370079
  • Microinch µin 39.370079
  • Caliber cl 0.0039370079
  • Centiinch cin 0.0039370079
  • Nautical Mile nmi 5.399568e-10
  • Nautical Mile (UK) NM (UK) 5.3961182e-10
  • Nautical League nl 1.799856e-10
  • Nautical League (UK) nl (UK) 1.7987061e-10
  • Mile (US survey) mi (US) 6.2136995e-10
  • Furlong (US survey) fur (US) 4.9709596e-9
  • Chain (US survey) ch (US) 4.9709596e-8
  • Rod (US survey) rd (US) 1.9883838e-7
  • Fathom (US survey) fath (US) 5.4680556e-7
  • Foot (US survey) ft (US) 0.0000032808333
  • Link (US survey) li (US) 0.0000049709596
  • Inch (US survey) in (US) 0.00003937
  • League (statute) st.league 2.0712332e-10
  • Pica pica 0.00023622047
  • Point pt 0.0028346457
  • Twip twip 0.056692913
  • Light Year ly 1.0570008e-22
  • Astronomical Unit AU 6.6845871e-18
  • Parsec pc 3.2407793e-23
  • Kiloparsec kpc 3.2407793e-26
  • Megaparsec Mpc 3.2407793e-29
  • Earth's Equatorial Radius R⊕(eq) 1.5678559e-13
  • Earth's Polar Radius R⊕(pol) 1.5731304e-13
  • Earth's Distance from Sun d⊕☉ 6.684492e-18
  • Sun's Radius R☉ 1.4374012e-15
  • Bohr Radius a₀ 18,897.261
  • Electron Radius (classical) rₑ 354,869,120
  • Fermi F 1,000,000,000
  • X-unit X 9,979,243.2
  • Planck Length ℓP 6.1871425e+28
  • Mile (Roman) mi (Rom) 6.7576517e-10
  • Roman Actus actus 2.818591e-8
  • Arpent arpent 1.7087708e-8
  • Cubit (UK) cubit 0.0000021872266
  • Cubit (Greek) cubit (Gk) 0.0000021608166
  • Long Cubit long cubit 0.0000018747657
  • Reed reed 3.6453777e-7
  • Long Reed long reed 3.1246094e-7
  • Span (cloth) span 0.0000043744532
  • Finger (cloth) finger 0.0000087489064
  • Nail (cloth) nail 0.000017497813
  • Handbreadth handbreadth 0.00001312336
  • Fingerbreadth fingerbreadth 0.000052493438
  • Aln aln 0.0000016841317
  • Famn famn 5.6137725e-7
  • Ken ken 4.7206329e-7
  • Russian Archin archin 0.0000014060742
  • Vara Castellana vara (cast) 0.0000011973868
  • Vara Conuquera vara (con) 3.9912894e-7
  • Vara de Tarea vara (tarea) 3.9912894e-7
  • Ja (Korean foot) 자 0.0000033
  • Chi 치 0.000033
  • Pun 푼 0.00033
  • Gan 간 5.5e-7
  • Jang 장 3.3e-7
  • Ri (Korean) 리 2.5462963e-9

About the micrometer

The micrometer (µm) is a SI unit of length.

About the millimeter

The millimeter (mm) is a SI unit of length.

Where this conversion is used

Converting micrometers to millimeters comes up when measuring height, screen sizes, travel distances, fabric, and construction dimensions. Metric and Imperial length units are both in daily use, so quick conversion is often needed when following instructions from another country.

Related conversions

Frequently asked questions

How many millimeters are in a micrometer?

One micrometer equals 0.001 millimeters.

How do you convert micrometers to millimeters?

Multiply the number of micrometers by 0.001 to get millimeters.

What is 1 millimeter in micrometers?

One millimeter equals 1,000 micrometers.

When would I convert micrometers to millimeters?

This conversion is common when measuring height, screen sizes, travel distances, fabric, and construction dimensions.

Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.