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Convert cm to mm

1 centimeter equals 10 millimeters. Enter a value below to convert instantly.

1 cm
10 mm

Multiply the number of centimeters by 10 to get millimeters. How this is calculated

Copy link puts your number after the #, which browsers never send to a server — but the link itself carries it, so anyone you send it to sees the value. Save keeps the unit pair in this browser only; clear it any time from your saved list.

Need the other direction? Convert millimeter to centimeter →

Formula

Multiply the number of centimeters by 10 to get millimeters.

Step by step

  1. Start with 1 cm.
  2. Multiply by the conversion factor 10.
  3. 1 × 10 = 10 mm.

Centimeters to Millimeters conversion table

Centimeters (cm) Millimeters (mm)
1 10
2 20
3 30
5 50
10 100
20 200
50 500
100 1,000
500 5,000
1,000 10,000

Convert Centimeter to other length units

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

  • Meter m 0.01
  • Kilometer km 0.00001
  • Hectometer hm 0.0001
  • Dekameter dam 0.001
  • Decimeter dm 0.1
  • Millimeter mm 10
  • Micrometer µm 10,000
  • Nanometer nm 10,000,000
  • Picometer pm 10,000,000,000
  • Femtometer fm 10,000,000,000,000
  • Attometer am 1e+16
  • Megameter Mm 1e-8
  • Gigameter Gm 1e-11
  • Terameter Tm 1e-14
  • Petameter Pm 1e-17
  • Exameter Em 1e-20
  • Angstrom Å 100,000,000
  • Mile mi 0.0000062137119
  • Yard yd 0.010936133
  • Foot ft 0.032808399
  • Inch in 0.39370079
  • Kiloyard kyd 0.000010936133
  • League lea 0.0000020712373
  • Furlong fur 0.000049709695
  • Chain ch 0.00049709695
  • Rod rd 0.0019883878
  • Perch perch 0.0019883878
  • Pole pole 0.0019883878
  • Rope rope 0.0016404199
  • Fathom fath 0.0054680665
  • Link li 0.049709695
  • Hand hand 0.098425197
  • Ell ell 0.0087489064
  • Barleycorn barleycorn 1.1811024
  • Mil mil 393.70079
  • Microinch µin 393,700.79
  • Caliber cl 39.370079
  • Centiinch cin 39.370079
  • Nautical Mile nmi 0.000005399568
  • Nautical Mile (UK) NM (UK) 0.0000053961182
  • Nautical League nl 0.000001799856
  • Nautical League (UK) nl (UK) 0.0000017987061
  • Mile (US survey) mi (US) 0.0000062136995
  • Furlong (US survey) fur (US) 0.000049709596
  • Chain (US survey) ch (US) 0.00049709596
  • Rod (US survey) rd (US) 0.0019883838
  • Fathom (US survey) fath (US) 0.0054680556
  • Foot (US survey) ft (US) 0.032808333
  • Link (US survey) li (US) 0.049709596
  • Inch (US survey) in (US) 0.3937
  • League (statute) st.league 0.0000020712332
  • Pica pica 2.3622047
  • Point pt 28.346457
  • Twip twip 566.92913
  • Light Year ly 1.0570008e-18
  • Astronomical Unit AU 6.6845871e-14
  • Parsec pc 3.2407793e-19
  • Kiloparsec kpc 3.2407793e-22
  • Megaparsec Mpc 3.2407793e-25
  • Earth's Equatorial Radius R⊕(eq) 1.5678559e-9
  • Earth's Polar Radius R⊕(pol) 1.5731304e-9
  • Earth's Distance from Sun d⊕☉ 6.684492e-14
  • Sun's Radius R☉ 1.4374012e-11
  • Bohr Radius a₀ 188,972,610
  • Electron Radius (classical) rₑ 3,548,691,200,000
  • Fermi F 10,000,000,000,000
  • X-unit X 99,792,432,000
  • Planck Length ℓP 6.1871425e+32
  • Mile (Roman) mi (Rom) 0.0000067576517
  • Roman Actus actus 0.0002818591
  • Arpent arpent 0.00017087708
  • Cubit (UK) cubit 0.021872266
  • Cubit (Greek) cubit (Gk) 0.021608166
  • Long Cubit long cubit 0.018747657
  • Reed reed 0.0036453777
  • Long Reed long reed 0.0031246094
  • Span (cloth) span 0.043744532
  • Finger (cloth) finger 0.087489064
  • Nail (cloth) nail 0.17497813
  • Handbreadth handbreadth 0.1312336
  • Fingerbreadth fingerbreadth 0.52493438
  • Aln aln 0.016841317
  • Famn famn 0.0056137725
  • Ken ken 0.0047206329
  • Russian Archin archin 0.014060742
  • Vara Castellana vara (cast) 0.011973868
  • Vara Conuquera vara (con) 0.0039912894
  • Vara de Tarea vara (tarea) 0.0039912894
  • Ja (Korean foot) 자 0.033
  • Chi 치 0.33
  • Pun 푼 3.3
  • Gan 간 0.0055
  • Jang 장 0.0033
  • Ri (Korean) 리 0.000025462963

About the centimeter

The centimeter (cm) is a SI unit of length.

About the millimeter

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

Where this conversion is used

Converting centimeters 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 centimeter?

One centimeter equals 10 millimeters.

How do you convert centimeters to millimeters?

Multiply the number of centimeters by 10 to get millimeters.

What is 1 millimeter in centimeters?

One millimeter equals 0.1 centimeters.

When would I convert centimeters 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.