Inches to Centimeters Converter
Convert inches (in) to centimeters (cm). One inch equals 2.54 centimeters, so multiply a value in inches by 2.54 to get centimeters.
Formula: multiply the source value by 2.54
Quick Conversions
About this tool
The inch is exactly 2.54 centimeters. A centimeter is one hundredth of a meter. Because 1 inch is 0.0254 meters and 1 centimeter is 0.01 meters, the factor is their ratio, 2.54.
How to use it
- Type a value in inches in the first field. The unit menus start on in → cm.
- Read the result in centimeters. It updates as you type; use Precision to choose how many decimals are shown.
- Press the swap button, or open the Centimeters to Inches converter, to convert centimeters back to inches.
cm = in × 2.54
in = cm ÷ 2.54
Examples
1 in to cm
1 in × 2.54 = 2.54 cm.
12 in to cm (one foot)
12 in × 2.54 = 30.48 cm.
27 in to cm (a 27-inch monitor diagonal)
27 in × 2.54 = 68.58 cm.
Inches to centimeters conversion table
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 10 | 25.4 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 250 | 635 |
| 500 | 1,270 |
| 1,000 | 2,540 |
Centimeters to inches (reverse)
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 | 0.393701 |
| 5 | 1.9685 |
| 10 | 3.93701 |
| 50 | 19.685 |
| 100 | 39.3701 |
FAQ
How many centimeters are in one inch?
One inch is 2.54 centimeters. The unrounded factor is 2.54.
How do I convert centimeters back to inches?
Divide by 2.54, or multiply by 0.393701. For example, 10 cm is 3.93701 in.
How do screen sizes convert to centimeters?
Screen sizes measure the diagonal. A 27-inch display has a 68.58 cm diagonal (27 × 2.54). The actual width and height depend on the aspect ratio.
Is the conversion exact?
Yes, before rounding. Both units are defined exactly in meters, so the only difference comes from how many decimals you choose to display.