Convert Inch to Centimeter.
Input the value of inches below to convert instantly to centimeters with standard conversions, definitions, and equations.
About converting inches to centimeters
Inches to centimeters is the reverse trip into metric — the conversion you reach for when an inch measurement has to be entered into a metric spec, recipe, or international order form.
Since one inch is exactly 2.54 centimeters, converting from inches is a simple multiplication: multiply the number of inches by 2.54. A 12-inch ruler is 30.48 cm, a 24-inch monitor is 60.96 cm across the diagonal, and a 6-foot person (72 inches) is 182.88 cm tall.
The exact 2.54 factor was not always the standard. Before 1959, several countries used slightly different inch definitions, which caused tiny discrepancies in precision engineering. The international yard and pound agreement unified the inch at exactly 25.4 millimeters, and that definition is what every modern conversion uses.
- Multiplying by 2.54 is exact; there is no rounding error to worry about for normal measurements.
- For fabric and woodworking, convert the whole measurement at once rather than converting each fraction of an inch separately to avoid compounding rounding.
How to Convert Inches to Centimeters
To convert inch to centimeter, we use the official conversion formulas. Below is the mathematical formula, plain-English explanation, and a worked example.
Inch (in)
Imperial and US customary unit equal to exactly 2.54 centimeters.
Centimeter (cm)
One-hundredth of a meter. Used worldwide for general height and object measurements.
Inch to Centimeter Conversion Table
| Inch (in) | Centimeter (cm) |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 15 in | 38.1 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
| 250 in | 635 cm |
| 500 in | 1270 cm |
| 1000 in | 2540 cm |
Centimeter to Inch Conversion Table
| Centimeter (cm) | Inch (in) |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 3 cm | 1.1811 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.93701 in |
| 15 cm | 5.90551 in |
| 20 cm | 7.87402 in |
| 25 cm | 9.84252 in |
| 50 cm | 19.68504 in |
| 100 cm | 39.37008 in |
| 250 cm | 98.4252 in |
| 500 cm | 196.85039 in |
| 1000 cm | 393.70079 in |