Inch To Centimetre Calculator

Work out inch to centimetre instantly with clear inputs, formula shown and shareable results.

About Inch To Centimetre Calculator

Converting Inches to Centimetres is a single multiplication: one in equals 2.54 cm, so the amount is multiplied by that factor. Switching the direction divides by the same factor instead. This factor is an exact definition, not a rounded approximation, so the conversion is precise at any scale.

Formulas

Inches → Centimetres

cm = in × 2.54

Centimetres → Inches

in = cm ÷ 2.54

Worked example

With the default values below, Inch To Centimetre Calculator returns Converted Value of 2.5400. Change any input above and every figure here is recalculated in your browser.

Inputs used

Amount to convert: 1
Directionone of Inches → Centimetres, Centimetres → Inches: Inches → Centimetres

Results

Converted Value: 2.5400
Result Unit: cm
Multiplier Applied: 2.54000000
Conversion Used: 1 in = 2.54 cm

Step by step

1Values used
2Inches → Centimetres
3Centimetres → Inches
4Converted Value= 2.5400
5Result Unit= cm
6Multiplier Applied= 2.54000000
7Conversion Used= 1 in = 2.54 cm

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 8 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How many cm are in one in?

One in is 2.54 cm. That figure is exact by definition.

How do I convert Centimetres back to Inches?

Divide by 2.54 instead of multiplying — or just switch the direction selector, which does it for you.