Machinist's Calculator
Calculator for Machinists and CNC Programmers
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Bolt Circle Calculator



Calculate X and Y coordinates


The bolt circle calculator enables the machinist to calculate X and Y coordinates for points arranged equally spaced in a circle, then copy those coordinates to the clipboard ready to send to your printer or paste into a CNC program.
Optionally, you can insert a line of text (such as a sub routine call) between each coordinate line.
For manual machine users, the coordinates can be printed on your computer's printer.

The starting angle must be entered as decimal degrees, but the bolt circle calculator has access to our Angle Converter, which will enable the user to convert between degrees.decimal and degree-minute-second.


Try it for FREE! Download the DEMO
(PC version)

Bolt circle calculator
PC and Windows tablet version screenshot.


Mobile version screenshot
Bolt Circle calculator
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Machinist's Calculator is also bundled with the EditCNC g-code editor.