Inches to Centimeters

in
Conversion

Convert inches to centimetres using the exact SI definition.

Formula

cm = inches × 2.54
  • Exact: 1 inch = 2.54 cm.

Inches to Centimeters Example

Inputs
  • Inches: 12 in

12 in × 2.54 = 30.48 cm

Frequently asked questions

How do I use the Inches to Centimeters?
Enter the value in the input field and the result updates immediately.
How accurate is this converter?
Uses internationally recognised conversion factors. Results are rounded to the displayed decimal places.
Can I verify this manually?
Yes — apply the formula shown above step by step.