Inches to Centimeters (in to cm)
Multiply inches by 2.54 to get centimeters. The factor is exact: the inch has been defined as 2.54 cm since 1959, so there is no rounding in the conversion itself.
Centimeters
2.54
Formula
centimeters = inches × 2.54
Example: 4 inches = 10.16 centimeters.
Inches to Centimeters chart
| inches | centimeters |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 8 | 20.32 |
| 10 | 25.4 |
| 12 | 30.48 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 30 | 76.2 |
| 36 | 91.44 |
| 48 | 121.92 |
| 50 | 127 |
| 60 | 152.4 |
| 72 | 182.88 |
| 100 | 254 |
Good to know
Screen sizes are a common case: a 55-inch TV is 139.7 cm across the diagonal. So are heights and waist sizes when filling in metric forms, and bolt or pipe sizes when ordering metric parts.
If your measurement is in feet and inches, convert the feet first (1 foot = 12 inches), add the inches, then multiply by 2.54. Five feet eight is 68 inches, or 172.72 cm.
Frequently asked questions
How many cm is 1 inch?
Exactly 2.54 centimeters.
How many cm is 12 inches?
12 inches (one foot) is 30.48 cm.
How do I convert 5 feet 8 inches to cm?
5 ft 8 in is 68 inches; 68 × 2.54 = 172.72 cm.