Inches to Centimetres Converter
Type a number to convert inches to centimetres. The result updates as you type, and you can swap the units to convert back.
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The formula
centimetres = inches x 2.54
How to convert inches to centimetres
To convert inches to centimetres, multiply by 2.54. One inch equals 2.54 centimetres, and one centimetre equals 0.3937 inches.
A worked example
12 inches is 30.48 centimetres.
Quick conversion table
| Inches | Centimetres |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 8 in | 20.32 cm |
| 10 in | 25.4 cm |
| 12 in | 30.48 cm |
| 15 in | 38.1 cm |
| 20 in | 50.8 cm |
| 24 in | 60.96 cm |
| 30 in | 76.2 cm |
| 36 in | 91.44 cm |
| 48 in | 121.92 cm |
| 60 in | 152.4 cm |
| 72 in | 182.88 cm |
And the other way: centimetres to inches
| Centimetres | Inches |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 15 cm | 5.9055 in |
| 20 cm | 7.874 in |
| 25 cm | 9.8425 in |
| 30 cm | 11.811 in |
| 40 cm | 15.748 in |
| 50 cm | 19.685 in |
| 60 cm | 23.622 in |
| 75 cm | 29.528 in |
| 100 cm | 39.37 in |
| 150 cm | 59.055 in |
| 170 cm | 66.929 in |
| 180 cm | 70.866 in |
| 200 cm | 78.74 in |
When you will need it
Sewing patterns, TV and monitor sizes and shoe-box dimensions often come in inches while rulers elsewhere use centimetres.
To estimate quickly, double the inches and add half again: 6 inches is about 15 cm.
Inches to Centimetres Converter: frequently asked questions
How many centimetres are in one inch?
One inch is 2.54 centimetres.
How many inches are in one centimetre?
One centimetre is 0.3937 inches.
Is this inches to centimetres conversion exact?
The factor is exact where the units are defined that way, and we show the result rounded for readability.
How exact is the conversion?
It uses the internationally agreed definitions, and rounds only the number you see.
Is what I enter in this converter saved or sent anywhere?
No. The calculation runs in your browser, so what you enter is not sent to our servers. We only count, anonymously, whether a tool ran successfully.
Is this converter free to use?
Yes. It is free, needs no sign-up and has no usage limit.
Last reviewed: October 3, 2026