Inches to Centimeters Converter

Convert inches to centimeters instantly.

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Common length units

Inch (in)

Definition: An inch (symbol: in or ") is a unit of length in the imperial and US customary systems of measurement. Since 1959, one inch has been defined as exactly 25.4 millimeters. There are 12 inches in a foot and 36 inches in a yard.

History/origin: The word inch derives from the Latin uncia, meaning one-twelfth. Early definitions were based on natural references: the width of a human thumb or the length of three barleycorns placed end to end. The modern standardized definition was agreed upon internationally in 1959.

Current use: The inch remains in common use in the United States, Canada, and the United Kingdom, particularly for human height, screen sizes, and construction materials such as lumber and pipes.

Centimeter (cm)

Definition: The centimeter is a metric length unit equal to 0.01 meters. There are 100 centimeters in one meter and 10 millimeters in one centimeter.

History/origin: After the meter became the core metric length, centimeters offered an easy ruler-friendly subdivision for education, household measuring, and practical trade.

Current use: Cm appears on rulers, clothing size charts, body measurements, furniture specs, craft patterns, school geometry, and everyday object dimensions in metric countries.