Convert Inch to Centimeter
Live bidirectional calculator for Inches (in) and Centimeters (cm) with verified formula and conversion charts.
Length8 units
How the Calculation Works (Linear Scaling)
Since 1 Inch = 2.54 Centimeters, multiply the value in Inches by 2.54.
Inch to Centimeter Conversion Table
Precomputed values for quick reference and printing.
| Inch | Centimeter |
|---|---|
| 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 |
| 7 in | 17.78 cm |
| 8 in | 20.32 cm |
| 9 in | 22.86 cm |
| 10 in | 25.4 cm |
| 15 in | 38.1 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 30 in | 76.2 cm |
| 40 in | 101.6 cm |
| 50 in | 127 cm |
| 75 in | 190.5 cm |
| 100 in | 254 cm |
| Centimeter | Inch |
|---|---|
| 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 |
| 6 cm | 2.3622 in |
| 7 cm | 2.7559 in |
| 8 cm | 3.1496 in |
| 9 cm | 3.5433 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 |
| 75 cm | 29.5276 in |
| 100 cm | 39.3701 in |
๐ Standard Benchmark Reference Values
International yard and pound agreement (1959).
Exact RatioAbout Inch (in)
The inch is defined as exactly 25.4 millimeters (0.0254 meters) by international agreement since 1959.
History: Historically based on the width of a human thumb. Standardized internationally in 1959 when English-speaking nations agreed on the exact metric equivalence.
Common Uses: Screen sizes, pipe diameters, construction lumber, and everyday measurement in the US, UK, and Canada.
About Centimeter (cm)
One hundredth of a meter (10โปยฒ m).
History: Part of the CGS system of units. Widely used in everyday life, especially outside the US.
Common Uses: Body measurements, clothing sizes, furniture dimensions, and school science.
โ Frequently Asked Questions
How many Centimeters are in 1 Inch?
There are exactly 2.54 Centimeters in 1 Inch (1 in = 2.54 cm).
What is the formula to convert Inch to Centimeter?
The formula is: Centimeter = Inch ร 2.54. Since 1 Inch = 2.54 Centimeters, multiply the value in Inches by 2.54.
How do I convert 1 in to cm manually?
To convert 1 in to cm: apply the formula Centimeter = Inch ร 2.54. Substituting gives: 1 ร 2.54 = 2.54 cm.