Inches to Centimeters Converter
1 inch (in) = exactly 2.54 centimeters (cm) — the international standard since 1959. 12 inches = 30.48 cm.
Inverse conversion
1 centimeter (cm) = 0.393701 inches. Since 1 inch = 2.54 cm exactly, divide cm by 2.54 to convert.
Formula
Formula
cm = inches × 2.54
Worked example
To convert 12 inches to cm, multiply 12 by 2.54. Result: 30.48 cm.
Quick reference table
| in | cm |
|---|---|
| 1 | 2.54 |
| 3 | 7.62 |
| 6 | 15.24 |
| 9 | 22.86 |
| 12 | 30.48 |
| 18 | 45.72 |
| 24 | 60.96 |
| 36 | 91.44 |
Unit definitions
Inch (in)
The inch (in) is a unit of length in the imperial and US customary systems, defined as exactly 25.4 mm.
Centimeter (cm)
The centimeter (cm) is one hundredth of a meter.
Common use cases
- Woodworking and carpentry
- TV and monitor screen sizes
- Clothing and shoe sizing