Centimeters to inches (cm to in)
The answer, the exact formula and a table with the values people look up most.
1 cm = 0.393701 in1 in = 2.54 cmInches = Centimeters ÷ 2.54Example: 30 cm = 11.811 in
1 cm = 0.3937007874 in
Conversions people ask for most
Convert centimeters to inches
| cm | 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 | 27.559 in |
| 80 cm | 31.496 in |
| 90 cm | 35.433 in |
| 100 cm | 39.37 in |
| 150 cm | 59.055 in |
| 200 cm | 78.74 in |
The factor is exact: it comes from the official definition of the units. The table rounds to a few decimals; the converter above gives up to 10 significant digits.
The two units
Centimeter cm
A centimeter is one hundredth of a meter, the base unit of length in the International System of Units (SI).
Inch in
An inch is exactly 2.54 centimeters by international agreement since 1959; it is used mainly in the United States and for screens and tires everywhere.
Frequently asked questions
How many inches are 30 centimeters?
30 cm = 11.811 in.
What is the formula to convert centimeters to inches?
Inches = Centimeters ÷ 2.54. 30 cm = 11.811 in.
Is this conversion exact?
Yes. The factor comes from the international definition of both units, so the only difference you may see is rounding.