Inch vs Centimeter: What's the Difference?

PropertyInch (in)Centimeter (cm)
Symbolincm
SystemImperialMetric (SI)
Categorylengthlength
Used inUnited States, United Kingdom, CanadaWorldwide
Conversion1 in = 2.54 cm

Definitions

Inch (in)

The inch (symbol: in or ") is a unit of length in the British imperial and United States customary systems of measurement. Since the international yard and pound agreement of 1959, one inch is defined as exactly 25.4 millimeters, or 1/12 of a foot, or 1/36 of a yard. This definition provides a clear, exact, and unambiguous relationship between the imperial and metric systems of measurement.

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Centimeter (cm)

### Formal Definition

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FAQ

What is the difference between Inch and Centimeter?
Inch (in) belongs to the imperial system. Centimeter (cm) belongs to the metric system. 1 in = 2.54 cm.
How to convert Inch to Centimeter?
Multiply the value in Inches by 2.54. Formula: cm = in × 2.54.
When should I use Inch vs Centimeter?
It depends on context. Inch is used in United States, United Kingdom, Canada. Centimeter is used in Worldwide.