Centimeters to Inches
Convert centimeters to inches with a calculator and a lookup table. The ratio is 0.3937, so 1 cm = 0.3937 in; examples and the reverse direction included.
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Formula for converting centimeters into inches
Going from centimeters to inches means scaling the number by 0.39370079. A quantity of 1 cm therefore shows up as 0.39370079 in in the widget above.
If an amount is already in inches, divide it by 0.39370079 to get centimeters; one inch is 2.54 centimeters.
Common centimeters-to-inches values
The table below lists 12 amounts of centimeters next to the matching inches. The amounts were picked to suit a ratio of 0.39370079, so the results stay easy to read.
| Centimeters (cm) | Inches (in) |
|---|---|
| 0.5 | 0.19685039 |
| 1 | 0.39370079 |
| 2 | 0.78740157 |
| 5 | 1.968503937 |
| 10 | 3.937007874 |
| 20 | 7.874015748 |
| 25 | 9.842519685 |
| 50 | 19.68503937 |
| 100 | 39.37007874 |
| 250 | 98.42519685 |
| 500 | 196.8503937 |
| 1,000 | 393.7007874 |
The converter formats numbers the same way, which means the in column above is what you would see after typing the cm value into the widget.
Step by step: cm to in
Suppose a quantity is 420 centimeters. Scaling it by 0.39370079 gives 165.3543307 inches.
A second amount, 55 centimeters, becomes 21.65354331 inches. Converting that result in the opposite direction recovers about 55 cm.
Example 3. Starting from the other unit, 65 in is 165.1 cm, since 1 in = 2.54 cm.
Reverse direction (in to cm)
If the amount you have is in inches, go to Inches to Centimeters. Here 1 in = 2.54 cm, and the layout mirrors this page.
Any other pairing is available in the Length Converter, built on the same conversion function as this page.
Related conversions
Related pages with their own tables, examples and formulas:
Frequently asked questions
One centimeter equals how many inches?
Each centimeter corresponds to 0.39370079 inches, which means 3.937007874 inches for 10 centimeters and 39.37007874 inches for 100 centimeters.
How many centimeters are in one inch?
1 in = 2.54 cm. The reverse ratio is the reciprocal of 0.39370079, so 10 in comes to 25.4 cm.
850 centimeters equals how many inches?
Multiply 850 by 0.39370079 and the answer is 334.6456693 in.
Will the in figure be rounded?
Calculation uses ordinary floating-point numbers, then the display is trimmed: 10 significant digits for values from 1 to 1,000, 8 for values below 1, and up to 6 decimals above 1,000. For this pair, 0.123456789 cm gives 0.048605035 in and 1,234.5678 cm gives 486.050315 in.
What calculation sits behind cm to in?
The unit table gives centimeters and inches each a multiplier against a common reference unit. Dividing one multiplier by the other leaves 0.39370079, which is applied to whatever number is entered.
How do I convert inches back to centimeters?
The page titled "Inches to Centimeters" covers it, or you can press the swap button in the widget above. For this direction multiply by 2.54, or equivalently divide by 0.39370079. As a check, 25 in comes to 63.5 cm.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →