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megametre millimetre |
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microinch |

How many mm in 1 microinch?
The answer is 2.54E-5.

We assume you are converting between **millimetre** and **microinch**.

You can view more details on each measurement unit:

mm or
microinch

The SI base unit for **length** is the metre.

1 metre is equal to 1000 mm, or 39370078.7402 microinch.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between millimetres and microinches.

Type in your own numbers in the form to convert the units!

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

The SI prefix "micro" represents a factor of
10^{-6}, or in exponential notation, 1E-6.

So 1 microinch = 10^{-6} inches.

The definition of a inch is as follows:

An inch is the name of a unit of length in a number of different systems, including Imperial units, and United States customary units. There are 36 inches in a yard and 12 inches in a foot. The inch is usually the universal unit of measurement in the United States, and is widely used in the United Kingdom, and Canada, despite the introduction of metric to the latter two in the 1960s and 1970s, respectively. The inch is still commonly used informally, although somewhat less, in other Commonwealth nations such as Australia; an example being the long standing tradition of measuring the height of newborn children in inches rather than centimetres. The international inch is defined to be equal to 25.4 millimeters.

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