Millimeters to Centimeters Converter
Convert millimeters to centimeters instantly with this free millimeters to centimeters converter. Enter any value to get an accurate length conversion, plus the formula, the conversion factor and a full reference table.
What is 1 millimeter in centimeters?
1 millimeter is equal to exactly 0.1 centimeters.
1 ÷ 10 = 0.1 centimeters
1 millimeter = 0.1 centimeters
Millimeters to Centimeters formula
cm = mm ÷ 10
The millimeters to centimeters conversion factor is 0.1, which is exact by definition. 1 millimeter = 0.1 centimeters, and 1 centimeter = 10 millimeters.
Worked examples
- 2 millimeters = 0.2 centimeters — 2 ÷ 10 = 0.2 centimeters
- 6 millimeters = 0.6 centimeters — 6 ÷ 10 = 0.6 centimeters
- 10 millimeters = 1 centimeters — 10 ÷ 10 = 1 centimeter
Millimeters to Centimeters conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Millimeters (mm) | Centimeters (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 |
| 6 mm | 0.6 cm |
| 7 mm | 0.7 cm |
| 8 mm | 0.8 cm |
| 9 mm | 0.9 cm |
| 10 mm | 1 cm |
| 12 mm | 1.2 cm |
| 15 mm | 1.5 cm |
| 20 mm | 2 cm |
| 25 mm | 2.5 cm |
| 30 mm | 3 cm |
| 50 mm | 5 cm |
| 75 mm | 7.5 cm |
| 100 mm | 10 cm |
| 500 mm | 50 cm |
| 1,000 mm | 100 cm |
When you need to convert millimeters to centimeters
- Buying furniture, TVs or appliances listed in one system and fitting them into a room measured in the other.
- Following building plans, sewing patterns or DIY instructions written abroad.
- Reading height, screen size or luggage limits when travelling between the US and the rest of the world.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
Millimeter (mm)
- A credit card is 0.76 mm thick
- A UK 1p coin is about 1.5 mm thick
Centimeter (cm)
- A standard pencil is about 19 cm long
- A US letter page is 21.6 cm wide
Common mistakes to avoid
- Dividing when you should multiply. Because 1 millimeter = 0.1 centimeters, the answer should be smaller than the number you started with.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
For everyday measurements round to the nearest whole unit or to one decimal place. Machining, sewing and construction usually need at least two decimals — and it is worth measuring in the target unit directly when tolerance matters.
How these units are defined
- Millimeter (mm): One thousandth of a meter; the standard fine unit on metric rulers. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Centimeter (cm): One hundredth of a meter, widely used for body and object measurements. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 millimeter in centimeters?
- 1 millimeter is equal to 0.1 centimeters.
- How many millimeters are in one centimeter?
- There are 10 millimeters in 1 centimeter.
- How do you convert millimeters to centimeters?
- Multiply the number of millimeters by 0.1 — or use the formula cm = mm ÷ 10.
- What is 6 millimeters in centimeters?
- 6 millimeters is 0.6 centimeters. 6 ÷ 10 = 0.6 centimeters.
- Is the millimeters to centimeters conversion exact?
- Yes. The relationship is fixed by definition, so 0.1 is an exact conversion factor — only the displayed result is rounded.