Unit Converters

Inches to Centimetres Converter

Convert between inches and centimetres using the exact 2.54 cm per inch factor. Type one side and read the other.

Try
Converted length
30.48 cm

12 inches → centimetres

Conversion factor
×2.54
Also in mm
304.8 mm
Conversion factors are exact; rounding may affect the final digit.
Was this helpful?

How it's calculated

cm = in × 2.54

in = inches, cm = centimetres. 1 inch = 2.54 cm (exact).

Common values

InchesCentimetres
12.54
615.24
1230.48
2460.96
3691.44

Common questions

How many centimetres are in an inch?

Exactly 2.54 cm, a fixed definition from the 1959 yard and pound agreement.

How do I go from cm back to inches?

Divide the centimetres by 2.54, or just flip the direction in the converter.