Thou to micrometers Converter

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

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

Thou to Micrometers Conversion Formula

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

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

Reverse formula (micrometers to thou)


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


Metric system. One millionth of a meter