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Please provide values below to convert millimeter [mm] to inch [in], or vice versa.
Millimeter
Definition: 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
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.
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.
Millimeter to Inch Conversion Table
| Millimeter [mm] | Inch [in] |
|---|---|
| 0.01 mm | 0.0003937008 in |
| 0.1 mm | 0.0039370079 in |
| 1 mm | 0.0393700787 in |
| 2 mm | 0.0787401575 in |
| 3 mm | 0.1181102362 in |
| 5 mm | 0.1968503937 in |
| 10 mm | 0.3937007874 in |
| 20 mm | 0.7874015748 in |
| 50 mm | 1.968503937 in |
| 100 mm | 3.937007874 in |
| 1000 mm | 39.3700787402 in |
How to Convert Millimeter to Inch
1 mm = 0.0393700787 in
1 in = 25.4 mm
Example: convert 15 mm to in:
15 mm = 15 × 0.0393700787 in = 0.5905511811 in
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Convert Millimeter to Other Length Units
mm to m
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mm to cm
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mm to feet
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Millimeter to Break
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Millimeter to Picometer
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Millimeter to Attometer
Millimeter to Megaparsec
Millimeter to Kiloparsec
Millimeter to Parsec
Millimeter to Astronomical Unit
Millimeter to League
Millimeter to Nautical League (UK)
Millimeter to Nautical League (int.)
Millimeter to League (statute)
Millimeter to Nautical Mile (UK)
Millimeter to Nautical Mile (international)
Millimeter to Mile (statute)
Millimeter to Mile (US Survey)
Millimeter to Mile (Roman)
Millimeter to Kiloyard
Millimeter to Furlong
Millimeter to Furlong (US Survey)
Millimeter to Chain
Millimeter to Chain (US Survey)
Millimeter to Rope
Millimeter to Rod
Millimeter to Rod (US Survey)
Millimeter to Perch
Millimeter to Pole
Millimeter to Fathom
Millimeter to Fathom (US Survey)
Millimeter to Ell
Millimeter to Foot (US Survey)
Millimeter to Link
Millimeter to Link (US Survey)
Millimeter to Cubit (UK)
Millimeter to Hand
Millimeter to Span (cloth)
Millimeter to Finger (cloth)
Millimeter to Nail (cloth)
Millimeter to Inch (US Survey)
Millimeter to Barleycorn
Millimeter to Mil
Millimeter to Microinch
Millimeter to Angstrom
Millimeter to A.u. Of Length
Millimeter to X-unit
Millimeter to Fermi
Millimeter to Arpent
Millimeter to Pica
Millimeter to Point
Millimeter to Twip
Millimeter to Aln
Millimeter to Famn
Millimeter to Caliber
Millimeter to Centiinch
Millimeter to Ken
Millimeter to Russian Archin
Millimeter to Roman Actus
Millimeter to Vara De Tarea
Millimeter to Vara Conuquera
Millimeter to Vara Castellana
Millimeter to Cubit (Greek)
Millimeter to Long Reed
Millimeter to Reed
Millimeter to Long Cubit
Millimeter to Handbreadth
Millimeter to Fingerbreadth
Millimeter to Planck Length
Millimeter to Electron Radius (classical)
Millimeter to Bohr Radius
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Millimeter to Earth's Distance From Sun
Millimeter to Sun's Radius
