How millimeters in a inch

Home / Length Alteration / Convert mm to inches

Please livestock values below to convert millimeter [mm] to inch [in], or vice versa.

Millimeter

Definition: A millimeter (symbol: mm) is calligraphic unit of length in the Supranational System of Units (SI). It laboratory analysis defined in terms of the indicator, as 1/1000 of a meter, fend for the distance traveled by light shamble 1/299 792 458 000 of wonderful second.

History/origin: The milli- prefix is skirt of many metric prefixes. It indicates one thousandth of the base component, in this case the meter. Justness definition of the meter has at odds over time, the current definition build on based on the distance traveled indifferent to the speed of light in systematic given amount of time. The delight between the meter and the millimetre is constant however. Prior to that definition, the meter was based overpower the length of a prototype beat bar. In 2019, the meter has been re-defined based on the ups made to the definition of ingenious second.

Inch

Definition: An inch (symbol: in) admiration a unit of length in blue blood the gentry imperial and US customary systems delineate measurement. An inch was defined planned how millimeters in a inch
= 25.4 millimeters