Inches to Centimeters Converter
One Inch equals 2.54 Centimeters (1 in = 2.54 cm). Multiply an Inch value by 2.54 to get the equivalent in Centimeters. Use the calculator above for your value, or check the examples and reference table below.
Formula
cm = in × 2.54
Multiply the Inch value by 2.54 to get the equivalent value in Centimeters.
Example Conversions
1 Inch (in)
2.54 Centimeter (cm)
5 Inch (in)
12.7 Centimeter (cm)
10 Inch (in)
25.4 Centimeter (cm)
25 Inch (in)
63.5 Centimeter (cm)
100 Inch (in)
254 Centimeter (cm)
Conversion Table
| Inch (in) | Centimeter (cm) |
|---|---|
| 0.1 | 0.254 |
| 0.5 | 1.27 |
| 1 | 2.54 |
| 2 | 5.08 |
| 5 | 12.7 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 250 | 635 |
| 500 | 1270 |
| 1000 | 2540 |
How to Convert Manually
Use these steps to convert Inch values to Centimeter without the calculator.
- Write down the value in Inch (in) that you want to convert.
- Multiply that value by 2.54.
- For example, 10 Inches × 2.54 = 25.4 Centimeters.
- Label the result as Centimeter (cm).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Inch and one Centimeter.
About Inch and Centimeter
The inch is defined as exactly 25.4 millimeters, one twelfth of a foot. Screen sizes, pipe diameters, and US manufacturing drawings are specified in inches. The centimeter is one hundredth of a meter (10 millimeters). It is the everyday small-length unit in metric countries, used where inches would be used in the US. One Inch equals 2.54 Centimeters (1 in = 2.54 cm). Inch is used in screen and display sizes and in US manufacturing and plumbing specifications. Centimeter is used in body height and clothing measurements.
Precision and Rounding:Length factors between metric and imperial units are exact by definition (1 ft = 0.3048 m since 1959), so any rounding error comes from display precision, not the factor. Two or three decimal places suit carpentry and DIY work; machining and surveying often require four or more.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15Inches equals38.1Centimeters.
15 in × 2.54 = 38.1 cm
FAQ
How do I convert Inch to Centimeter?
Multiply the Inch value by 2.54 to get the equivalent value in Centimeters.
What is the formula for Inch to Centimeter?
The formula is cm = in × 2.54.
How many Centimeters are in 1 Inch?
1 Inch equals 2.54 Centimeters.
Can I convert Centimeter back to Inch?
Yes. 1 Centimeter equals 0.3937007874 Inches, and the related converter can reverse the calculation.
What are common names for Inch and Centimeter?
Inch is shown as in and may also be searched as inches, ". Centimeter is shown as cm and may also be searched as centimetre, centimeters, centimetres.
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