Convert inches to centimeters
1 in = 2.54 cm — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
2.54cm
As a fraction: 127/50
1 in = 2.54 cm
How to convert inches to centimeters
Multiply the number of inches by 2.54 to get centimeters.
The exact factor is 2.54 — as a fraction, 127/50.
Inch: Defined as exactly 25.4 mm by the 1959 international yard and pound agreement.
Inch to Centimeter conversion table
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 in | 2.54 |
| 2 in | 5.08 |
| 3 in | 7.62 |
| 5 in | 12.7 |
| 10 in | 25.4 |
| 20 in | 50.8 |
| 25 in | 63.5 |
| 50 in | 127 |
| 100 in | 254 |
| 250 in | 635 |
| 500 in | 1270 |
| 1000 in | 2540 |
Centimeter to Inch conversion table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 cm | 0.393 700 79 |
| 2 cm | 0.787 401 57 |
| 3 cm | 1.181 102 4 |
| 5 cm | 1.968 503 9 |
| 10 cm | 3.937 007 9 |
| 20 cm | 7.874 015 7 |
| 25 cm | 9.842 519 7 |
| 50 cm | 19.685 039 |
| 100 cm | 39.370 079 |
| 250 cm | 98.425 197 |
| 500 cm | 196.850 39 |
| 1000 cm | 393.700 79 |
Frequently asked
How many centimeters are in a inch?
One inch equals 2.54 centimeters (in → cm). That figure is exact, not rounded.
How do you convert inches to centimeters?
Multiply the number of inches by 2.54 to get centimeters.
What is 1 cm in inches?
One centimeter is 0.3937007874 inches.
What is 10 in in cm?
10 in = 25.4 cm.
What exactly is a inch?
Defined as exactly 25.4 mm by the 1959 international yard and pound agreement.