Mils to mm
One mil is a thousandth of an inch, or 0.0254 mm. US drawings use it for circuit trace widths, film and sheet thickness, and coating depth.
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Common values
Formula
mm = mils × 0.0254
It is also called a thou — the same unit. The name resembles millimetre, but a mil is under a fortieth of one.
Frequently asked questions
Q. How many mm is 1 mils?
1 mils is 0.0254 mm, and 10 mils is 0.254 mm. Type any value in the box above to convert instantly.
Q. And how many mils is 1 mm?
1 mm is 39.3701 mils. This converter works both ways, so typing in the right box updates the left one.
Q. Where is this unit used?
It is also called a thou — the same unit. The name resembles millimetre, but a mil is under a fortieth of one.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.