Inches to Centimeters Converter
Convert inches (in) to centimeters (cm) using the exact 2.54 factor, with unit definitions and examples.
Let’s convert it.
Swap unitsDecimals welcome. The answer updates as you type.
12 in × 2.54 ≈ 30.48 cm
Understanding inches and centimeters
To convert inches to centimeters, multiply by 2.54. Every inch contributes exactly 2.54 centimeters to the total length.
What are inches (in)?
An inch (in) is a customary unit of length. Twelve inches make one foot, and each inch is exactly 2.54 centimeters.
What are centimeters (cm)?
A centimeter (cm) is a metric unit of length equal to 0.01 meter or 10 millimeters.
How to use this converter
- Enter the number of inches.
- For a fraction such as 1/2 inch, enter its decimal form, 0.5.
- Read the result in centimeters.
The conversion formula
centimeters = inches × 2.54
A worked example
A 12-inch length is 12 × 2.54 = 30.48 cm. No rounding is needed for this example.
Screen sizes are often given in inches. A 24-inch screen has a diagonal of 60.96 cm; that number describes the diagonal, rather than the width.
Quick conversion table
Values are rounded for readability.
| inches (in) | centimeters (cm) |
|---|---|
| 1 | 2.54 |
| 5 | 12.7 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
Common questions
Is the 2.54 factor exact?
Yes. The international inch is defined as exactly 2.54 cm.
How do I convert half an inch?
Enter 0.5. Multiplying 0.5 by 2.54 gives 1.27 cm.