conversions
Centimeters to Millimeters
Last updated: May 31, 2026
Written by Blake Boege
A centimeters to millimeters converter is a metric measurement utility that translates lengths between centimeters and millimeters. Because both units belong to the decimal metric system, the conversion is a direct factor of 10. It is widely used by students, designers, tailor designers, and crafters.
Convert centimeters to millimeters instantly. Read the conversion answers, the mathematical formula, and browse the reference lookup table.
Quick Answer
Convert centimeters to millimeters instantly. 1 centimeter is equal to exactly 10 millimeters.
Centimeters to Millimeters
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Answer
10 mm
1 cm = 10 mm
Centimeters to Millimeters Reference Table
| Centimeters (cm) | Millimeters (mm) | Description |
|---|---|---|
| 1 cm | 10.00 mm | Width of a standard fingernail |
| 5 cm | 50.00 mm | Short side of a credit card |
| 10 cm | 100.00 mm | Length of a typical smartphone |
| 25 cm | 250.00 mm | Length of a standard computer keyboard |
| 50 cm | 500.00 mm | Length of a standard violin |
| 100 cm | 1,000.00 mm | Exactly one meter benchmark |
Examples
1 cm
10 mm
How it works
To convert centimeters (cm) to millimeters (mm), perform the following calculation:
Formula
mm = cm × 10
Method
Multiply centimeters by 10 to get millimeters.
Understanding Centimeters to Millimeters Conversions
Converting measurements between metric and imperial scales, or relative speed and capacity benchmarks, is essential in sciences, logistics, cooking, and daily travel. Using standard multipliers guarantees precision and alignment across different measurement systems.
How to convert centimeters to millimeters
To perform the conversion manually, use the formula mm = cm × 10. For example, to convert 10 centimeters into millimeters, multiply 10 by 10, yielding 100 mm.
How to convert millimeters to centimeters
To reverse the conversion, use the formula cm = mm ÷ 10. For instance, if you have 100 millimeters, divide 100 by 10 (or multiply by its reciprocal 0.10000000), which equals 10.0000 cm.
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Frequently asked questions
Multiply the centimeter value by 10. For example, 5 cm = 5 × 10 = 50 mm.
There are exactly 10 millimeters in 1 centimeter.
Both are metric units of length. Centi- means hundredth (1/100 of a meter) and milli- means thousandth (1/1000 of a meter), so 1 cm is exactly 10 times larger than 1 mm.
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