Convert cm to inches — Free Centimeters to Inches Calculator
Convert centimeters to inches instantly. Enter any value and get the exact conversion with the formula displayed. Accurate to 4 decimal places.
Last updated: January 2026
Centimeters to Inches Converter
The centimeters to inches conversion formula
To convert centimeters to inches, multiply by 0.393701. The formula is:
For example: 10 cm = 3.937 inches. This formula works for any value you enter in the calculator above.
Common cm to inches conversions
| Centimeters (cm) | Inches (inches) |
|---|---|
| 1 | 0.3937 |
| 5 | 1.9685 |
| 10 | 3.937 |
| 15 | 5.9055 |
| 20 | 7.874 |
| 25 | 9.8425 |
| 30 | 11.811 |
| 50 | 19.6851 |
| 100 | 39.3701 |
| 170 | 66.9292 |
| 180 | 70.8662 |
| 190 | 74.8032 |
Use the converter above to calculate any custom value. The result updates instantly as you type.
Why both centimeters and inches are used
Different countries use different measurement systems for historical reasons. The metric system (meters, kilometers, centimeters) is used in most of the world and is the standard in science and international trade. The imperial system (feet, miles, inches) is primarily used in the United States. This means that professions like engineering, construction, aviation, and international shipping regularly need to convert between the two systems. Knowing both and having a reliable conversion tool is essential for cross-border work.
How to use this converter
Simply type a value in either field — the converter instantly calculates the equivalent in the other unit. The conversion formula is shown below the inputs so you can see exactly how the result was calculated. Use the conversion table for quick reference of common values.
Need more conversions? Try the full unit converter which supports length, weight, temperature, volume, speed, area, energy, and pressure conversions all in one page.
Frequently asked questions about cm to inches conversion
How do I convert centimeters to inches?
To convert centimeters to inches, multiply by 0.393701. For example, 1 cm × 0.393701 = 0.3937 inches.
What is the formula to convert centimeters to inches?
The formula to convert centimeters to inches is: inches = centimeters × 0.393701. Simply multiply the number of centimeters by 0.393701 to get the equivalent in inches.
What is the difference between centimeters and inches?
Centimeters and inches are units of distance or length. Centimeters are primarily used in the metric system.
Common cm to inches conversions
Common conversions include: 1 cm = 0.39 inches, 5 cm = 1.97 inches, 10 cm = 3.94 inches, 15 cm = 5.91 inches, 20 cm = 7.87 inches, 25 cm = 9.84 inches, 30 cm = 11.81 inches, 50 cm = 19.69 inches. Use the calculator above for any value.