Centimeters to Inches Converter
Type a value in centimeters to get it in inches, and see the reverse conversion.
Your numbers
Your results
Centimeters to Inches Converter by TheCalcTools
How the Centimeters to Inches Converter works
An inch is defined as exactly 2.54 centimetres (since 1959), so converting centimetres to inches means dividing by 2.54. Screen sizes, waist sizes and paper sizes are often converted this way.
To convert centimeters to inches, multiply by 0.3937007874. The calculator shows the result to 6 significant figures; the conversion factor itself is exact by definition.
Quick estimate in your head: divide centimetres by 2.5 (slightly overestimates by about 1.6%).
The formula
Worked example
Using the default values shown in the calculator:
| Value in centimeters (cm) | 30 |
|---|
- 30 cm × 0.3937007874 = 11.811 in.
Result:
| Inches (in) | 11.811 |
|---|---|
| 1 cm in in | 0.393701 |
| Your number read as in, in cm | 76.2 |
| Feet (ft) | 0.984252 |
| Millimetres (mm) | 300 |
Conversion table
| cm | in |
|---|---|
| 1 cm | 0.393701 in |
| 2 cm | 0.787402 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.93701 in |
| 15 cm | 5.90551 in |
| 20 cm | 7.87402 in |
| 30 cm | 11.811 in |
| 50 cm | 19.685 in |
| 100 cm | 39.3701 in |
| 150 cm | 59.0551 in |
| 180 cm | 70.8661 in |
Frequently asked questions
What is 1 centimeter in inches?
1 centimeter (cm) equals 0.393701 in.
Is 30 cm 12 inches?
Almost: 30 cm is 11.81 inches. A 12-inch ruler is 30.48 cm long.
Sources and further reading
- Wikipedia: Inch
- Wikipedia: Foot (unit)
- NIST: Guide for the Use of the International System of Units (SI)
Related calculators
More in Unit Converters · All calculators
This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.