How to convert millimeters to centimeters
To convert millimeters to centimeters, multiply by 0.1. Length conversions are used everywhere from construction drawings and travel distances to sewing patterns and science homework.
Millimeter to Centimeter conversion table
| Millimeter (mm) | Centimeter (cm) |
|---|---|
| 0.1 mm | 0.01 cm |
| 0.5 mm | 0.05 cm |
| 1 mm | 0.1 cm |
| 2 mm | 0.2 cm |
| 3 mm | 0.3 cm |
| 4 mm | 0.4 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 |
| 500 mm | 50 cm |
| 1,000 mm | 100 cm |
About the units
Millimeter (mm)
A millimeter is one thousandth of a meter. It is the standard unit on engineering drawings, rulers and screw sizes.
Centimeter (cm)
A centimeter is one hundredth of a meter, widely used for body height, clothing sizes and everyday measurements outside the US.
How to use this converter
- Type the number of millimeters (mm) in the input box.
- The result in centimeters appears instantly — no button needed.
- See the same value in every other length unit just below.
- Use “Swap units” to convert centimeters back to millimeters.
When you’ll use the millimeter to centimeter conversion
Converting millimeters to centimeters comes up more often than you might expect — for example when sizing a TV, monitor or picture frame, reading a product spec sheet from another country, or measuring furniture to see if it fits through a doorway. Type your number once and you get the exact answer plus every related unit, so you don’t need to convert twice.
💡 The factor is exact and easy to remember: 1 mm = 0.1 cm.
Watch out for these mix-ups
- Confusing the international mile with the nautical mile (1,852 m).
- Writing 5′10″ as 5.10 ft — it is actually about 5.83 ft.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many centimeters are in one millimeter?
One millimeter equals 0.1 centimeters. 0.1 is the exact factor used by this converter.
How do I convert millimeters to centimeters?
Multiply the value in millimeters by 0.1. To go the other way, multiply centimeters by 10.
What is 10 mm in cm?
10 mm = 1 cm. Also, 5 mm = 0.5 cm and 100 mm = 10 cm.
What is the difference between a millimeter and a centimeter?
A millimeter is one thousandth of a meter. It is the standard unit on engineering drawings, rulers and screw sizes. A centimeter is one hundredth of a meter, widely used for body height, clothing sizes and everyday measurements outside the US.
Is this tool free and private?
Yes — the Millimeter to Centimeter is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
Related tools
📬 Get new tools first — free
Join Taurang to hear about new calculators, converters and features. No spam; unsubscribe anytime.