Convert inches to centimeters
Converting inches to centimeters is a common length task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 in equals 2.54 cm, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert inches to centimeters
To convert inches to centimeters, multiply the number of inches by 2.54. For example, 10 in × 2.54 = 25.4 cm.
cm = in × 2.54
- Write down the value in inches you want to convert.
- Multiply it by 2.54 (the exact in→cm factor).
- The result is your value in centimeters. Check it below with the converter or the table.
Conversion table
Common values of inches and their equivalents in centimeters:
| in | cm |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 10 | 25.4 |
| 20 | 50.8 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 250 | 635 |
| 500 | 1,270 |
About these units
Inch (in). An inch is a unit of the imperial and US customary systems, legally defined as exactly 25.4 millimeters since 1959. It is used for screen sizes, tools and construction in the United States.
Centimeter (cm). A centimeter is one hundredth of a meter, roughly the width of a fingernail. It is the everyday unit for body measurements, clothing sizes and small objects in metric countries.
Frequently asked questions
How do I convert inches to centimeters?
To convert inches to centimeters, multiply the number of inches by 2.54. For example, 10 in × 2.54 = 25.4 cm. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many centimeters are in 1 inch?
1 in = 2.54 cm. That is the fixed relationship used by this converter and by international standards.
How many inches are in 1 centimeter?
1 cm = 0.393701 in. If you are converting in the opposite direction, use our Centimeter to Inch converter for the dedicated table and FAQ.
Is the inches to centimeters conversion exact?
Yes. Both units are defined by international agreement, so the factor of 2.54 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is inch used for?
An inch is a unit of the imperial and US customary systems, legally defined as exactly 25.4 millimeters since 1959. It is used for screen sizes, tools and construction in the United States.