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Convert millimeters to centimeters
Instant, accurate mm → cm conversion with a live converter, table and formula.
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1 millimeter = 0.1 centimeters
1 centimeter = 10 millimeters
millimeters to centimeters table
| millimeters (mm) | centimeters (cm) |
|---|---|
| 0.5 | 0.05 |
| 1 | 0.1 |
| 2 | 0.2 |
| 5 | 0.5 |
| 10 | 1 |
| 20 | 2 |
| 50 | 5 |
| 100 | 10 |
| 500 | 50 |
| 1000 | 100 |
Formula
centimeters = millimeters × 0.1.
Example
10 millimeters = 1 centimeters.
What is a millimeter?
A millimeter (mm) is one-thousandth of a meter — about the thickness of a credit-card edge.
What is a centimeter?
A centimeter (cm) is one-hundredth of a meter; roughly the width of a fingernail.
Real-world reference points
A meter is about one long stride; a foot is a large shoe; an inch is the top joint of a thumb.
| Reference | millimeters | centimeters |
|---|---|---|
| Credit card width | 85.6 mm | 8.56 cm |
| Average adult height | 1,700 mm | 170 cm |
| Door height | 2,000 mm | 200 cm |
| Football (soccer) pitch length | 105,000 mm | 10,500 cm |
| Marathon distance | 42,200,000 mm | 4,220,000 cm |
Mistakes to avoid with length conversions
- Mixing unit systems mid-calculation — convert everything first, then do the math.
- Treating yards and meters as equal: a yard is ~8.6% shorter, which compounds over long distances.
- Rounding centimeters to inches too early when cutting materials — keep one extra decimal until the final cut.
Frequently asked questions
How many centimeters in a millimeters?+
1 millimeter = 0.1 centimeters.
How do I convert millimeters to centimeters?+
Enter the value in the millimeters box above and the centimeters value appears instantly. You can also type in the centimeters box to convert the other way.
Is this mm to cm converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.