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Home / Length Conversion / Convert inches to mm
Convert inches to mm
Please provide values below to convert inch [in] to millimeter [mm], or vice versa. InchDefinition: 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. History/origin: The term "inch" was derived from the Latin unit "uncia" which equated to "one-twelfth" of a Roman foot. There have been a number of different standards for the inch in the past, with the current definition being based on the international yard. One of the earliest definitions of the inch was based on barleycorns, where an inch was equal to the length of three grains of dry, round barley placed end-to-end. Another version of the inch is also believed to have been derived from the width of a human thumb, where the length was obtained from averaging the width of three thumbs: a small, a medium, and a large one. Current use: The inch is mostly used in the United States, Canada, and the United Kingdom. It is also sometimes used in Japan (as well as other countries) in relation to electronic parts, like the size of display screens. MillimeterDefinition: A millimeter (symbol: mm) is a unit of length in the International System of Units (SI). It is defined in terms of the meter, as 1/1000 of a meter, or the distance traveled by light in 1/299 792 458 000 of a second. History/origin: The milli- prefix is one of many metric prefixes. It indicates one thousandth of the base unit, in this case the meter. The definition of the meter has changed over time, the current definition being based on the distance traveled by the speed of light in a given amount of time. The relationship between the meter and the millimeter is constant however. Prior to this definition, the meter was based on the length of a prototype meter bar. In 2019, the meter has been re-defined based on the changes made to the definition of a second. Inch to Millimeter Conversion TableInch [in]Millimeter [mm]0.01 in0.254 mm0.1 in2.54 mm1 in25.4 mm2 in50.8 mm3 in76.2 mm5 in127 mm10 in254 mm20 in508 mm50 in1270 mm100 in2540 mm1000 in25400 mmHow to Convert Inch to Millimeter1 in = 25.4 mm1 mm = 0.0393700787 in Example: convert 15 in to mm:15 in = 15 × 25.4 mm = 381 mm Popular Length Unit Conversionscm to inchesinches to cmmm to inchesinches to mmmeters to feetfeet to meterskm to milesmiles to kmcm to feetfeet to cminches to feetfeet to inchesmeters to yardsyards to metersmm to cmcm to mmcm to mm to cmcm to kmkm to cmmm to feetfeet to mmmeters to milesmiles to metersfeet to milesmiles to feetyards to feetfeet to yardsinches to metersmeters to inchesmm to mm to mmkm to mm to kminches to yardsyards to inchesyards to milesmiles to yardsConvert Inch to Other Length Unitsinches to metersInch to KilometerInch to Decimeterinches to cmInch to MicrometerInch to NanometerInch to Mileinches to yardsinches to feetInch to Light YearInch to BreakInch to ExameterInch to PetameterInch to TerameterInch to GigameterInch to MegameterInch to HectometerInch to DekameterInch to MicronInch to PicometerInch to FemtometerInch to AttometerInch to MegaparsecInch to KiloparsecInch to ParsecInch to Astronomical UnitInch to LeagueInch to Nautical League (UK)Inch to Nautical League (int.)Inch to League (statute)Inch to Nautical Mile (UK)Inch to Nautical Mile (international)Inch to Mile (statute)Inch to Mile (US Survey)Inch to Mile (Roman)Inch to KiloyardInch to FurlongInch to Furlong (US Survey)Inch to ChainInch to Chain (US Survey)Inch to RopeInch to RodInch to Rod (US Survey)Inch to PerchInch to PoleInch to FathomInch to Fathom (US Survey)Inch to EllInch to Foot (US Survey)Inch to LinkInch to Link (US Survey)Inch to Cubit (UK)Inch to HandInch to Span (cloth)Inch to Finger (cloth)Inch to Nail (cloth)Inch to Inch (US Survey)Inch to BarleycornInch to MilInch to MicroinchInch to AngstromInch to A.u. Of LengthInch to X-unitInch to FermiInch to ArpentInch to PicaInch to PointInch to TwipInch to AlnInch to FamnInch to CaliberInch to CentiinchInch to KenInch to Russian ArchinInch to Roman ActusInch to Vara De TareaInch to Vara ConuqueraInch to Vara CastellanaInch to Cubit (Greek)Inch to Long ReedInch to ReedInch to Long CubitInch to HandbreadthInch to FingerbreadthInch to Planck LengthInch to Electron Radius (classical)Inch to Bohr RadiusInch to Earth's Equatorial RadiusInch to Earth's Polar RadiusInch to Earth's Distance From SunInch to Sun's Radius |
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