Inches to Centimeters Converter
Type a length in inches and see it in centimeters as you go, using the exact factor of 2.54 centimeters per inch. The two boxes are linked, so editing the centimeter side converts straight back to inches, which is handy for reading screen sizes, clothing measurements or drawings that mix both units.
How to convert inches to centimeters
- Type the length in inches into the left box.
- Read the centimeter value in the right box as it updates live.
- Edit the centimeter box instead to convert a length back to inches.
- Clear a box and enter a new number to start a fresh conversion.
Examples
One inch
1 in
2.54 cm
Six inches
6 in
15.24 cm
One foot
12 in
30.48 cm
Frequently asked questions
What is the formula to convert inches to centimeters?
Multiply the number of inches by 2.54, so cm equals inches times 2.54. For example, 10 inches becomes 10 times 2.54, which is 25.4 centimeters. To go the other way, divide centimeters by 2.54.
Is this conversion exact?
Yes. Since 1959 one inch has been defined as exactly 2.54 centimeters, so the factor is a definition rather than an approximation. Results may be rounded for display, but the underlying calculation is precise.
What are some common inches to centimeters conversions?
1 in is 2.54 cm, 3 in is 7.62 cm, 6 in is 15.24 cm, 12 in (one foot) is 30.48 cm, 24 in is 60.96 cm, and 36 in (one yard) is 91.44 cm.
How do I convert screen and TV sizes from inches to cm?
Screen and TV sizes state the diagonal in inches, so multiply by 2.54. A 32 inch screen is about 81.3 cm and a 55 inch TV is about 139.7 cm measured corner to corner, not across the width.
How many centimeters are in a foot?
A foot is 12 inches, and 12 times 2.54 is 30.48, so one foot equals 30.48 centimeters. A yard, which is 36 inches, is 91.44 centimeters.
How do I convert a height like 5 feet 9 inches?
First turn it into total inches. Five feet is 60 inches, plus 9 gives 69 inches. Enter 69 here to get about 175.3 centimeters. Adding whole feet as 12 inches each keeps mixed heights simple.
What is the difference between inches and centimeters?
The inch is an imperial and US customary unit, while the centimeter is metric, one hundredth of a meter. They measure the same thing, length, and one inch is defined as exactly 2.54 of those centimeters.
Is my data sent anywhere?
No. The conversion runs entirely in your browser, so the lengths you type never leave your device and nothing is uploaded to a server.
Learn more
- Inches to centimeters: the 2.54 factor explained
Why one inch equals exactly 2.54 centimeters, how to convert heights and screen sizes, and a quick reference table for everyday lengths.
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