CM to Inches Converter
Convert centimetres to inches in your browser, with a full reference table and the formula behind it. Free, instant, no sign-up.
How to convert centimetres to inches
inches = centimetres × 0.393701
One centimetre is 0.393701 inches, so any conversion is a single multiplication. To go the other way, divide by 0.393701 instead. The converter above is already set to centimetres and inches, so you can type any value and read the answer straight away.
CM to Inches conversion table
Common values, worked out in advance:
| Centimetres (cm) | Inches (in) |
|---|---|
| 1 cm | 0.393701 in |
| 2 cm | 0.787402 in |
| 3 cm | 1.1811 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 |
| 50 cm | 19.685 in |
| 100 cm | 39.3701 in |
The quick mental version
For a rough answer without a calculator, remember that 1 in is about 2.54 cm. That is usually close enough for shopping, travel and DIY, and the converter above gives you the exact figure when it matters.
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Frequently asked questions
How many inches are in 1 cm?
One cm is 0.393701 in. The table above covers the values people look up most often.
What is the formula to convert centimetres to inches?
inches = centimetres × 0.393701. One centimetre is 0.393701 inches, so any conversion is a single multiplication. To go the other way, divide by 0.393701 instead.
Is this cm to inches converter accurate?
Yes. It uses the exact internationally defined conversion factors and calculates in your browser, so nothing is rounded until the result is displayed.
Can I convert inches back to centimetres here?
Yes. Use the swap button in the converter to reverse the direction, or pick any other pair of units from the two dropdowns.