cm to Inches
Convert centimeters to inches for your next measurement.
Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.
Your result
How to convert centimeters to inches
1 cm = 0.393701 in. 1 inch is exactly 2.54 cm.
Formula: inches = centimeters ÷ 2.54
Examples
- 13 cm = 5.12 in
- 30 cm = 11.81 in
- 175 cm = 68.9 in
cm to in conversion table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 cm | 0.3937 in |
| 2 cm | 0.7874 in |
| 3 cm | 1.1811 in |
| 4 cm | 1.5748 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 15 cm | 5.9055 in |
| 20 cm | 7.874 in |
| 25 cm | 9.8425 in |
| 30 cm | 11.811 in |
| 40 cm | 15.748 in |
| 50 cm | 19.685 in |
| 60 cm | 23.622 in |
| 70 cm | 27.5591 in |
| 80 cm | 31.4961 in |
| 90 cm | 35.4331 in |
| 100 cm | 39.3701 in |
| 150 cm | 59.0551 in |
| 160 cm | 62.9921 in |
| 170 cm | 66.9291 in |
| 180 cm | 70.8661 in |
| 200 cm | 78.7402 in |
Values are rounded to 4 decimal places.
How to use Cm to inches
- Enter the values you want to calculate and choose the relevant units or settings.
- The result updates as you type. Adjust the available settings if needed.
- Review the result, then use Copy result or a download link when available.
Useful next steps
How Cm to inches works
This converter turns centimeters into inches as you type. It uses the exact international definition of 1 inch = 2.54 cm, so it divides your centimeter value by 2.54 and rounds the result to 12 significant digits. It accepts decimals, negative values and scientific notation such as 1e3. The result is a decimal number of inches; it does not split the answer into feet and inches or into fractions such as 3/8, so you need to do that step yourself.
Before you start
Make sure your measurement is in centimeters, not millimeters, and use a period as the decimal point. A value written as 2,5 is not accepted.
A worked example
Entering 30 cm returns 11.811023622 inches, and entering 2.54 cm returns exactly 1 inch.
Continue your workflow: Length, Kg to lb, Aspect ratio calculator.
Common questions
How many centimeters are in an inch?
Exactly 2.54. The inch has been defined as 2.54 centimeters by international agreement since 1959, so this is not a rounded figure. To convert centimeters to inches, divide by 2.54. To convert inches to centimeters, multiply by 2.54.
How do I convert my height in cm to feet and inches?
Convert to inches first, then divide by 12. For 170 cm, this tool shows 66.9291338583 inches. 66.93 ÷ 12 is 5 with about 6.93 inches left over, so 170 cm is about 5 feet 6.9 inches, or roughly 5 feet 7 inches.
Is it accurate to multiply by 0.39?
Only roughly. One centimeter is 0.393700787402 inches, so multiplying by 0.39 undercounts by about 1%. That is 0.3 inches short on a 30 cm ruler. This converter divides by the exact 2.54 factor instead.
Can I convert to fractions of an inch like 1/16?
Not directly. The result is a decimal. To get sixteenths, multiply the decimal part by 16 and round. For 30 cm, 0.811 × 16 is about 12.98, so the result is close to 11 13/16 inches.