The inch (abbreviation: in or ″) is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to 1⁄36 yard but usually understood as 1⁄12 of a foot. Inches to cm converter. Easily convert Inches to Centimeters, with formula, conversion chart, auto conversion to common lengths, more. Convert centimeters (cm) to inches. Directions. Enter length in box to be converted. Select either inches or centimeters button. Press 'convert' button to see result at bottom of calculator. Centimeters. The centimetre is a unit of length in the metric system, equal to one-hundredth of a metre. 1cm is equivalent to 0.39370 inches. Inches conversion calculators, tables and formulas to automatically convert from other length units. Actual size of Inch Ruler. width:12.0Inch (304.8mm). full screen drag it iframe embed. +. Actual size image of Inch Ruler . Inch definition is - a unit of length equal to 1/3₆ yard. How to use inch in a sentence. Did You Know?