Convert inches to centimeters instantly. Enter a value below, or use the formula and reference table further down the page.
In practice
Converting inches to centimeters is usually what you need when buying something designed or manufactured outside the US — appliances, tools, fabric, screens. Like the reverse direction, the 2.54cm-per-inch figure is an exact international standard fixed in 1959, not a rounded approximation. A common mix-up: US TV and monitor sizes are always quoted in inches measured diagonally corner-to-corner, so converting that number gives you a diagonal length, not the screen's width or height — worth knowing before you assume a converted number tells you whether something will physically fit.
How to convert inches to centimeters
Multiply the value by 2.54.
cm = in × 2.54Example: 10 in = 25.4 cm.
Inches to Centimeters conversion table
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 15 in | 38.1 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
Frequently asked questions
How many centimeters is 1 inch?
1 inch equals 2.54 centimeters.
What is the formula to convert in to cm?
To convert in to cm, multiply the value by 2.54. The full formula is: cm = in × 2.54.
How do I convert centimeters back to inches?
Use the same calculator above and type your value into the centimeters field instead — it converts in both directions. Or use the reverse formula: in = cm ÷ 2.54.
Is the in to cm conversion exact?
The conversion factor used here (2.54) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.