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Machinist's Calculator
Calculator for Machinists and CNC Programmers
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Drill Size Conversion Chart



This application will enable the user to quickly look up the decimal sizes of Number and Letter drills in the inch system.


Try it for FREE! Download the DEMO
(PC version)
Drill Chart Inch
PC and Windows tablet screenshot
Mobile version screenshots
Inch drill conversions
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Click the down arrow and use the drill charts to find the size needed. Click on the line to enter it into the diameter window.
This application opens ready to use the measuring system last used. If the metric system was used last, you'll be prompted to change to "Inch" for this function. You may also use the "Inch" and "Metric" options to convert values shown between Inch and Metric measurements.

spacer Machinist's Calculator for mobile devices Click here for mobile Machinist Calculator information.
Machinist's Calculator is also bundled with the EditCNC g-code editor.