Inch. Definition: An inch (symbol: in) is a unit of length in the imperial and US customary systems of measurement. An inch was defined to be equivalent to exactly 25.4 millimeters in 1959. There are 12 inches in a foot and 36 inches in a yard.
Inches to cm converter. Easily convert Inches to Centimeters, with formula, conversion chart, auto conversion to common lengths, more