📏 Inches to Centimeters Converter
Convert inches (in) to centimeters (cm) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 inch (in) = 2.54 centimeters (cm). Formula: cm = in × 2.54.
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Inches to Centimeters Converter inputs
Result
Inches to Centimeters conversion table
| Inches (in) | Centimeters (cm) |
|---|---|
| 0.1 in | 0.254 cm |
| 0.5 in | 1.27 cm |
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
| 1,000 in | 2,540 cm |
Other length conversions
in to mmin to cmin to min to kmin to ftin to ydin to miin to nmi
How to convert inches to centimeters
Multiply the number of inches by 2.54 to get centimeters: cm = in × 2.54.
Example: 5 in = 12.7 cm.
The inch (in) and the centimeter (cm) are both units of length. Need the opposite direction? Use the cm to in converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many centimeters are in a inch?
1 inch = 2.54 centimeters.
How do I convert inches to centimeters?
Use the formula cm = in × 2.54. For example, 5 in = 12.7 cm.
How do I convert centimeters back to inches?
1 centimeter = 0.39370079 inches. Use the cm to in converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.