Micrometers to mils Converter

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

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

Micrometers to Mils Conversion Formula

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

Where Lmicrometers is the length in micrometers and Lmils is its equivalent in mils.

Reverse formula (mils to micrometers)


Metric system. One millionth of a meter


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.