Convert inches to millimeters

How many millimeters in an inch? 1 inch is equal to 25.4 millimeters, which is the conversion factor from inches to millimeters.
Go ahead and convert your own value of in to mm in the converter below.

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Facts about inch (in)

An inch (plural: inches; symbol or abbreviation: in or, sometimes, ″ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. Its size can vary from system to system. There are 36 inches in a yard and 12 inches in a foot. A corresponding unit of area is the square inch and a corresponding unit of volume is the cubic inch. See all conversions for inches here.

Facts about millimetre (mm)

A millimetre (American spelling: millimeter, symbol mm) is one thousandth of a metre (the metre is the International System of Units (SI) base unit of length). The millimetre is part of a metric system. The corresponding unit of area is the square millimetre and the corresponding unit of volume is the cubic millimetre. See all conversions for millimeters here.

General information about in to mm

Conversion category:Length
SI standard unit for length:Metre (m)
Related categories:Area, Volume, Paper size, TV & monitor size, Angle

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