CM to Inches Converter
Convert centimeters to inches and inches to centimeters instantly.
Edit either field and the other updates instantly. 1 inch = 2.54 cm exactly.
CM to Inches Conversion Table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 cm | 0.3937 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 20 cm | 7.874 in |
| 50 cm | 19.685 in |
| 100 cm | 39.37 in |
The CM to Inch Formula
The conversion between centimeters and inches is based on an exact, internationally agreed definition: 1 inch = 2.54 cm. This has been the official definition since 1959, when the international yard and pound agreement standardized imperial units against the metric system.
- Centimeters to inches: inches = centimeters ÷ 2.54
- Inches to centimeters: centimeters = inches × 2.54
Where Each Unit Is Used
Centimeter (cm)
The centimeter is part of the metric system (1/100 of a meter) and is the everyday unit of length across most of the world. It is used for body measurements, clothing sizes, paper dimensions, and the size of small objects.
Inch (in)
The inch is part of the imperial and US customary systems (1/12 of a foot). It is widely used in the United States and United Kingdom for screen sizes, tire and wheel dimensions, height, and construction measurements.