mmCalculator

What is it?

It’s a purpose built calculator to convert millimeters to inches with a fun twist… Spin the knob and the numbers appear!

At initial power-on, each click of the knob is a millimeter increment with the calculation to inches displayed.

Who is it for?

Originally conceived for engineering drawing converting while estimating machining jobs, but many other instances have arisen.

The Buttons:

R for Reset; start the fun over. S for Switch; alternate from incrementing by millimeters to inches. P for Precision; click to increment by 0.1, 0.01, 0.001, or 10.