Instant free online tool for inch to millimeter conversion or vice versa. The inch [in] to millimeter [ mm ] conversion table and conversion steps are also listed. Also, explore tools to convert inch or millimeter to other length units or learn more about length conversions. Calculator: Convert Millimeters to Inch ( mm to in) To achieve the desired result as quickly as possible, it is best to enter the value to be converted as text, for example '23 mm to in ' or '67 mm into in ' or simply '12 mm '. In most cases, the word 'to' (or '=' / '->') can be omitted between the names of the two units, for example '1 mm in ' instead of '56 mm to in'. Use the full power of this unit converter to convert mm to in With this calculator, it is possible to enter the value to be ... MM to inches converter. Easily convert millimeters to inches , with formula, conversion chart, auto conversion to common lengths, more An inch is a measurement unit that is 1/36 of a yard in British Imperial and US Customary measurement systems. Relationship between Millimetre and Inch The following is the mathematical connection between millimetres and inches : 0.0393701 inch = 1 millimetre 25.4 millimetres = 1 inch Formula for Converting Millimetres into Inches