Centimeters to Inches

cm
Conversion

Convert centimetres to inches using the exact SI definition (1 inch = 2.54 cm).

Formula

inches = cm ÷ 2.54
  • Exact definition: 1 inch = 2.54 cm (since 1959).

Centimeters to Inches Example

Inputs
  • Centimetres: 30 cm

30 cm ÷ 2.54 = 11.8110 in

Frequently asked questions

How do I use the Centimeters to Inches?
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.