Micrometers to thou Converter

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

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 thou in the "thou" field, the equivalent value in micrometers is calculated and displayed in the top field.

Micrometers to Thou Conversion Formula

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

Where Lmicrometers is the length in micrometers and Lthou is its equivalent in thou.

Reverse formula (thou to micrometers)


Metric system. One millionth of a meter


The thou is a unit of measure for length equivalent to 1/1000 of an inch, that is 0.001 inches. It is also known as 'mil'. Introduced around 1844, it is still used today in manufacturing specifications of certain products such as printed circuit boards (ex. size of via holes and distance between lines), paper thickness (ex. newspaper paper thickness is around 2 to 4 thou), latex gloves. Reference: Wikipedia