As a machinist or CNC programmer, you often have to use trigonometry to calculate hole positions, chamfers, sine bar stacks, dovetail measurements, bolt circles, etc. You often have to leaf through reference books, drill charts, speed and feed tables, thread wire charts and so on to find the information you need.
On the other hand, you can use the Machinist's Calculator - fast, easy and accurate - and affordable!

Speeds and feeds for turning, milling drilling and tapping; coordinates for bolt circles; decimal inch and metric conversions for drills; tap drill sizesand much more!
After calculations are made, the data may be printed from the user's computer. The coordinates produced in the grid or bolt circle applications can also be copied to the clipboard for pasting into a text editor.

Features
Calculate speeds, feeds, and more!
Right angle trigonometry
Regular polygon calculations
Dovetail measurement calculations
Oblique trigonometry
Calculate grid pattern coordinates
Calculate bolt circle coordinates
Measure threads with three wires