Millimetres to centimetres
Multiply millimetres by 0.1 to get centimetres.
25 mm = 2.5 cm
How to convert millimetres to centimetres
The centimetre is one hundredth of a metre (10⁻² m). The millimetre is one thousandth of a metre (10⁻³ m).
Worked example — 25 mm: 25 × 0.1 = 2.5 cm.
Millimetres to centimetres table
| Millimetres | Centimetres |
|---|---|
| 1 mm | 0.1 cm |
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 20 mm | 2 cm |
| 25 mm | 2.5 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 250 mm | 25 cm |
| 500 mm | 50 cm |
Reverse and related
About millimetres and centimetres
Millimetre (mm)
1 mm = 0.1 cmDefinition. One thousandth of a metre (10⁻³ m)
History and origin
The millimetre is one thousandth of a metre, defined with the rest of the decimal metric system in the 1790s. Its small size suits precise work.
Current use
Millimetres are used for rainfall, engineering tolerances, and the sizes of screws, hardware and printed parts.
Source: BIPM, The International System of Units (SI), 9th ed. (2019)
Centimetre (cm)
1 cm = 10 mmDefinition. One hundredth of a metre (10⁻² m)
History and origin
The centimetre is one hundredth of a metre, part of the decimal metric system introduced in France in the 1790s. It was the base length of the older centimetre-gram-second system before the metre-kilogram-second system prevailed.
Current use
Centimetres are the everyday metric unit for body height, paper and screen sizes, and clothing measurements.
Source: BIPM, The International System of Units (SI), 9th ed. (2019)
Where people use this
Millimetres: rainfall, engineering tolerances, screws and hardware. Centimetres: height, paper and screen sizes, clothing measurements. 10 mm is exactly 1 cm.
Every value is carried to full double precision; the display is rounded.
Both units are defined in BIPM, The International System of Units (SI), 9th ed. (2019).
Questions people ask
How many cm is 10 mm?
10 mm is exactly 1 cm.
How many mm make a cm?
It takes 10 millimetres to make one centimetre.
What is 25 mm in cm?
25 mm is 2.5 cm.