Inches to centimetres converter
Centimetres (cm)
1 inch = 2.54 centimetres
How to convert inches to centimetres
cm = in × 2.54
Multiply the number of inches by 2.54 to get centimetres. Going the other way, divide by 2.54 (or multiply by 0.393700787402).
One inch is exactly defined as 2.54 centimetres (to 12 significant figures), and one centimetre is 0.393700787402 inches.
Worked examples
- Convert 5 inches: 5 × 2.54 = 12.7 12.7 centimetres.
- Convert 12.5 inches: 12.5 × 2.54 = 31.75 31.75 centimetres.
- Convert 250 inches: 250 × 2.54 = 635 635 centimetres.
Quick-reference table
| in | cm |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 5 | 12.7 |
| 10 | 25.4 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 50 | 127 |
| 75 | 190.5 |
| 100 | 254 |
| 1,000 | 2,540 |
| cm | in |
|---|---|
| 1 | 0.3937007874 |
| 2 | 0.7874015748 |
| 3 | 1.181102362 |
| 5 | 1.968503937 |
| 10 | 3.937007874 |
| 15 | 5.905511811 |
| 20 | 7.874015748 |
| 25 | 9.842519685 |
| 50 | 19.68503937 |
| 75 | 29.52755906 |
| 100 | 39.37007874 |
| 1,000 | 393.7007874 |
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Frequently asked questions
How many centimetres are in 1 inch?
1 inch equals 2.54 centimetres.
What is the formula to convert inches to centimetres?
Use cm = in × 2.54. Multiply the number of inches by 2.54 to get centimetres. Going the other way, divide by 2.54 (or multiply by 0.393700787402).
What is 100 inches in centimetres?
100 inches is 254 centimetres.