Inches to centimeters
1 inch in centimeters
1 in = 2.54 cm
cm = in × 2.54
To convert inches to centimeters, multiply by 2.54. The table below gives the values people look up most often, and the converter works for any number.
Inches to centimeters table
| Inches | Centimeters |
|---|---|
| 1 in | 2.54 |
| 2 in | 5.08 |
| 3 in | 7.62 |
| 4 in | 10.16 |
| 5 in | 12.7 |
| 10 in | 25.4 |
| 15 in | 38.1 |
| 20 in | 50.8 |
| 25 in | 63.5 |
| 30 in | 76.2 |
| 40 in | 101.6 |
| 50 in | 127 |
| 75 in | 190.5 |
| 100 in | 254 |
| 250 in | 635 |
| 500 in | 1,270 |
| 1,000 in | 2,540 |
How the conversion works
The relationship is cm = in × 2.54. Both units measure length, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.
Common questions
- How many centimeters are in one inch?
- One inch equals 2.54 centimeters. cm = in × 2.54.
- How do you convert inches to centimeters?
- Use cm = in × 2.54. So 10 in is 25.4 cm.
- How many inches are in one centimeter?
- One centimeter equals 0.3937 inches, which is the reverse of the conversion above.
Related pages
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place