Inches to Centimeters Converter
Convert inches to centimeters, or centimeters to inches, using the exact factor of 2.54. Decimals are supported, so you can convert measurements like 5.5 inches.
How to Use the Inches to Centimeters Converter
- Choose a direction: inches → centimeters or centimeters → inches.
- Enter the length you want to convert. Decimals such as 5.5 are fine.
- Read the converted value and the formula used in the result panel.
- Copy the result, or click Reset to clear the converter.
Examples
Inches → centimeters
- Input
- 12 in
- Output
- 12 in = 30.48 cm Formula: cm = in × 2.54
Centimeters → inches
- Input
- 100 cm
- Output
- 100 cm = 39.370079 in Formula: in = cm ÷ 2.54
About the Inches to Centimeters Converter
Inches are used in the US for screen sizes, clothing, furniture, paper and DIY measurements, while most other countries use centimeters. Converting between the two comes up when shopping internationally, following a pattern or checking product dimensions.
One inch is defined as exactly 2.54 centimeters, so the conversion is exact: multiply inches by 2.54 to get centimeters, or divide centimeters by 2.54 to get inches. Results are rounded to at most 6 decimal places, which is far more precise than most rulers.
For heights written in feet and inches, use the Feet to Centimeters converter instead. The calculation runs in your browser with JavaScript, and this tool does not send what you enter to a Usevanta server.
Frequently Asked Questions
How many centimeters are in an inch?
One inch is exactly 2.54 centimeters. This has been the international definition since 1959.
How do I convert inches to cm by hand?
Multiply the number of inches by 2.54. For example, 5.5 inches × 2.54 = 13.97 cm.
How do I convert centimeters to inches?
Divide the number of centimeters by 2.54. For example, 100 cm ÷ 2.54 ≈ 39.37 inches.
How big is a 15.6-inch laptop screen in centimeters?
About 39.62 cm, measured diagonally. Screen sizes in inches always refer to the diagonal.