inches to cm
1 inch equals 2.54 centimeters. Formula: centimeters = inches × 2.54.
= 139.7 cm
Other direction: cm to inches
Formula
centimeters = inches × 2.54
Example: 55 in = 139.7 cm.
When you need inches to cm
US product listings love inches: TV and laptop screens are measured diagonally in inches, waistbands and picture frames are sold in inches, and DIY plans from American sites assume them. Multiplying by 2.54 tells you what that means on a metric tape measure — a 55-inch TV is about 139.7 cm across the diagonal.
Height is the other frequent case. 5 feet 10 inches is 70 inches, which works out to 177.8 cm. Since the inch has been defined as exactly 2.54 cm since 1959, this conversion is exact rather than approximate.
Common in to cm values
| Inches (in) | Centimeters (cm) |
|---|---|
| 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 |
| 24 | 60.96 |
| 36 | 91.44 |
| 55 | 139.7 |
FAQ
How many centimeters is 1 inch?
1 inch equals exactly 2.54 centimeters. This has been the international definition of the inch since 1959, so inch-to-cm conversions are exact.
What is 5 feet 10 inches in cm?
5 ft 10 in is 70 inches total, and 70 × 2.54 = 177.8 cm.