Inch to Centimeter (in to cm)
Convert in to cm — Length converter
1 inch = 2.54 centimeters (exact).
The inch (in) is a US and imperial length unit; the centimeter (cm) is metric. To convert inches to centimeters, multiply by 2.54 — a value that is exact by definition, not rounded.
This conversion comes up constantly for screen sizes, body measurements, and any project that mixes imperial plans with metric tools. Twelve inches (one foot) is exactly 30.48 cm.
2.54Click to copy
1 in = 2.54 cm
Inch to Centimeter formula
1 Inch = 2.54 cm
Worked examples
- 25 in = 63.5 cm
- 100 in = 254 cm
Common uses
- Converting a waist, chest, or inseam measurement to cm
- Turning an inch-based screen or monitor size into cm
- Reading US construction or furniture dimensions in metric
Inch to Centimeter conversion table
| Inch (in) | Centimeter (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 5 | 12.7 |
| 8 | 20.32 |
| 10 | 25.4 |
| 12 | 30.48 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 250 | 635 |
| 500 | 1270 |
| 1000 | 2540 |
Frequently asked questions
How many centimeters are in an inch?
One inch equals exactly 2.54 centimeters.
What is 5 inches in cm?
5 in = 12.7 cm.
What is 12 inches (one foot) in cm?
12 in = 30.48 cm.
Why is the inch exactly 2.54 cm?
In 1959 the international yard and pound agreement defined the inch as exactly 2.54 cm, so the conversion is precise rather than approximate.