Convert inches to centimeters
cm = in × 2.54. 8 in = 20.32 cm.
cm = in × 2.54 — 1 in is 2.54 cm
Common values, converted exactly
| inches (in) | centimeters (cm) |
|---|---|
| 1 in (1) | 2.54 cm |
| 2 in (2) | 5.08 cm |
| 3 in (3) | 7.62 cm |
| 4 in (4) | 10.16 cm |
| 5 in (5) | 12.7 cm |
| 6 in (6) | 15.24 cm |
| 8 in (8) | 20.32 cm |
| 10 in (10) | 25.4 cm |
| 12 in (12) | 30.48 cm |
| 15 in (15) | 38.1 cm |
| 20 in (20) | 50.8 cm |
| 24 in (24) | 60.96 cm |
Related conversions
To convert inches to centimeters, apply cm = in × 2.54. For example, 8 in = 20.32 cm, and 1 in is 2.54 cm.
One inch is exactly 2.54 cm — a definition, not a measurement, agreed internationally in 1959. Every other length conversion on this site is derived from it.
Everything on this page is computed in your browser from the exact definitions above — the table is not a stored list of pre-rounded answers, and neither is the converter. For a unit not covered here, the full unit converter handles length, weight, volume, temperature and cooking measures.
How many centimeters is 8 in?
8 in = 20.32 cm. cm = in × 2.54, so any amount converts the same way — the table on this page lists the values most often looked up.
What is the formula for converting inches to centimeters?
cm = in × 2.54. One inch is exactly 2.54 cm — a definition, not a measurement, agreed internationally in 1959. Every other length conversion on this site is derived from it.
Is the inches to centimeters conversion exact?
The underlying relationship is an exact definition, not a measurement. The decimal factor shown (2.54 cm) is a rounding of it, so results here are given to six significant figures — enough for any practical use, and you can see the exact definition above.
How do I convert centimeters back to inches?
Use the reverse of the same relationship; the cm to inches page has its own table and converter.