Click on the links below for a couple of one-page reference charts which you can print out and stick on your shop wall.

The first chart converts fractions to decimals and vice versa, running from 1/64" to a full inch, and listing every 1/64th of an inch. This is really handy when you have to divide a measurement into several equal segments and the math for fractions is getting out of hand. Hey, it's been a while since most of us sat in a classroom...

The second chart converts millimeters (and centimeters) to inches, so you can read European plans, use their drill bits and so on.