Mils to microns Converter

This page allows you to convert length values expressed in mils to their equivalent in microns.

Enter the value in mils in the top field (the one marked "mil"), then press the "Convert" button or the "Enter" key. The converter also works the other way round: if you enter the value in microns in the "µ" field, the equivalent value in mils is calculated and displayed in the top field.

Mils to Microns Conversion Formula

$L_{microns}=L_{mils} * \frac{127}{5}$

Where Lmils is the length in mils and Lmicrons is its equivalent in microns.

Reverse formula (microns to mils)


The mil is a unit of measure typically used in manufacturing and engineering for describing distance tolerances with high precision or for specifying the thickness of materials. One mil is equal to one thousandth of an inch, or 10-3 inches.

The mil is also referred to as thou.

The closest unit to the mil in the metric system is the micrometer: One mil is equal to 25.4 µm.


The micron (µ), is a unit of length that is equivalent to 10-6 m (one millionth of a meter). It is infact an alternate name for micrometer. The unofficial term micron is still used in many fields of technology, such as electronic component manufacturing and specification.