Inches to centimeters (in to cm)
The answer, the exact formula and a table with the values people look up most.
1 in = 2.54 cm1 cm = 0.393701 inCentimeters = Inches × 2.54Example: 17 in = 43.18 cm
1 in = 2.54 cm
Conversions people ask for most
Convert inches to centimeters
| in | cm |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 8 in | 20.32 cm |
| 10 in | 25.4 cm |
| 12 in | 30.48 cm |
| 14 in | 35.56 cm |
| 15.6 in | 39.624 cm |
| 17 in | 43.18 cm |
| 20 in | 50.8 cm |
| 24 in | 60.96 cm |
| 27 in | 68.58 cm |
| 32 in | 81.28 cm |
| 40 in | 101.6 cm |
| 43 in | 109.22 cm |
| 50 in | 127 cm |
| 55 in | 139.7 cm |
| 65 in | 165.1 cm |
| 75 in | 190.5 cm |
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
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.
Centimeter cm
A centimeter is one hundredth of a meter, the base unit of length in the International System of Units (SI).
Frequently asked questions
How many centimeters are 17 inches?
17 in = 43.18 cm.
What is the formula to convert inches to centimeters?
Centimeters = Inches × 2.54. 17 in = 43.18 cm.
Is this conversion exact?
Yes. The factor comes from the international definition of both units, so the only difference you may see is rounding.