Convert inches and centimetres instantly. This free inch to cm converter works either direction using the exact factor (1 in = 2.54 cm), and also shows millimetres and feet-and-inches.
Convert
in
Enter a length and choose the direction. One inch equals exactly 2.54 centimetres, so the conversion is precise (not rounded).
Centimetres
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Enter a length
Inches
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Centimetres
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Millimetres
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Feet & inches
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A quick estimate: multiply inches by 2.5 for centimetres, or centimetres by 0.4 for inches. The calculator uses the exact factor (2.54) for accurate results.
Use this free inch to cm converter to switch between inches and centimetres in either direction. Enter a length and get an exact conversion instantly.
What this inch to cm converter does
An inch to cm converter changes a length between inches and centimetres. One inch equals exactly 2.54 cm, and the tool also shows millimetres and feet-and-inches.
So 12 inches = 30.48 cm and 100 cm = 39.37 inches.
Common inch to cm conversions
Inches
Centimetres
1
2.54
6
15.24
12 (1 foot)
30.48
24
60.96
39.37
100
Inches, cm and screen/clothing sizes
This converter is handy for screen sizes, clothing, crafts and DIY. For example, a 27-inch monitor is about 68.6 cm diagonally, and a 32-inch waist is roughly 81 cm. The feet-and-inches output also helps with heights.
How to use the inch to cm converter
Choose the direction (inches → cm or cm → inches).
Enter the length.
Read the converted result, millimetres and feet-and-inches.
Inch to CM FAQ
How do I convert inches to cm?
Multiply inches by 2.54. For example, 12 inches × 2.54 = 30.48 cm. The converter does it instantly in either direction.
How do I convert cm to inches?
Divide centimetres by 2.54 (or multiply by about 0.3937). So 100 cm ÷ 2.54 ≈ 39.37 inches.
How many cm is 1 inch?
Exactly 2.54 centimetres — the conversion is precise, not rounded.
How many cm is a foot (12 inches)?
30.48 cm, since 12 × 2.54 = 30.48.
What's a quick way to estimate?
Multiply inches by 2.5 for a rough centimetre value, or centimetres by 0.4 for inches.
Is the inch to cm converter free?
Yes, this inch to cm converter is completely free, needs no sign-up, and gives instant results in your browser.
