Inches to CM Converter

Convert the other wayCM to Inches

Enter a length in inches to see the equivalent in centimeters. Useful when a US customary measurement needs to be expressed in metric units.

How it works

The international inch is defined as exactly 2.54 centimeters. Multiplying an inch value by 2.54 therefore yields centimeters with no conversion-table rounding. Twelve inches (one foot) are exactly 30.48 centimeters.

Formula

centimeters = inches × 2.54

Worked examples

12 in → 30.48 cm
1 in → 2.54 cm

Useful notes

This is the reverse of converting centimeters to inches (divide by 2.54). The two operations are exact inverses of the same definition.
A US customary foot is 12 inches, so 1 ft = 30.48 cm exactly under this definition.

FAQ

How many centimeters are in one inch?: Exactly 2.54 centimeters. The inch is defined that way internationally.
How many centimeters are in a foot?: A foot is 12 inches, so 12 × 2.54 = 30.48 centimeters exactly.
Is this the same as converting cm to inches?: It uses the same 2.54 definition in the opposite direction: multiply inches by 2.54 instead of dividing centimeters by 2.54.

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