Instant Unit Conversion
Convert Inches to Centimeters (in to cm)
Exact formula, conversion factors, live calculator, and reference charts for inches to centimeters.
Method reviewed:Exact defined factors — international yard and pound (1959), US customary gallon and cup, SI — the values NIST SP 811 lists · reviewed September 2026
Direct AnswerFormula: cm = in × 2.54
1 inch is equal to exactly 2.54 centimeters. To convert inches to centimeters, multiply the inch value by 2.54.
Live Inches to Centimeters Calculator
Formula:
cm = in × 2.54Open full length converter →Inches to Centimeters Conversion Table
Quick reference conversion chart from 1 to 100 inches.
| Inches (in) | Centimeters (cm) | Mathematical Formula |
|---|---|---|
| 1 in | 2.54 cm | 1 × 2.54 |
| 2 in | 5.08 cm | 2 × 2.54 |
| 5 in | 12.7 cm | 5 × 2.54 |
| 10 in | 25.4 cm | 10 × 2.54 |
| 15 in | 38.1 cm | 15 × 2.54 |
| 20 in | 50.8 cm | 20 × 2.54 |
| 25 in | 63.5 cm | 25 × 2.54 |
| 50 in | 127 cm | 50 × 2.54 |
| 75 in | 190.5 cm | 75 × 2.54 |
| 100 in | 254 cm | 100 × 2.54 |
Frequently Asked Questions
How many cm in an inch?
There are exactly 2.54 centimeters in 1 inch.