Inches to CM Converter
Convert inch to centimeter instantly. 1 in = 2.54 cm, worked steps and a full reference table.
How to use it
- Type the value in inch — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 in | 2.54 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 100 in | 254 cm |
One inch equals 2.54 centimeters (cm). To convert inches to centimeters, multiply by 2.54; to go back the other way, multiply by 0.39370079 instead.
The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.
What inches and centimeters actually measure
Inch (in) — An inch is exactly 25.4 millimetres by international agreement since 1959. Screen sizes, pipe and tyre diameters, and construction in the US.
Centimeter (cm) — A centimetre is a hundredth of a metre. Body measurements, clothing sizes, paper and furniture dimensions across most of the world.
Inches to CM conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| in | cm |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 25 in | 63.5 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
How to convert inches to centimeters by hand
Multiply the number of inches by 2.54.
For example, 25 in × 2.54 = 63.5 cm.
Going the other way, divide by 2.54 — or multiply by 0.39370079, which is the same thing and easier to do in your head.
Everything runs in your browser
There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.
Questions people ask
How many cm are in 1 in?
1 in equals exactly 2.54 cm. Multiply any value in inch by 2.54 to get centimeter.
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Also searched for
People find this page looking for inch is cm, inches to centimeters, inches from centimeters, how many inches is 25 cm, inches tk.cm, how many inches is 15 cm.
Last updated 18 August 2026