Inches to Centimeters Converter
Convert inches to centimeters instantly. Exact factor: 1 in = 2.54 cm.
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Convert inches to centimeters
The exact conversion factor is 1 in = 2.54 cm. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the inches value by 2.54 to get centimeters.
Worked example
- Take 1 in
- multiply by 2.54
- the result is 2.54 cm
How to use it
- Enter your inches
- Read the centimeters result
- Check the factor line to verify by hand
Frequently asked questions
How many centimeters are in one inches?
Exactly 2.54 cm, by the SI/NIST definition.
How do I convert centimeters back to inches?
Divide by 2.54 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.