Machinist's Calculator
Calculator for Machinists and CNC Programmers
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Tapping Drill Charts

This application will enable the user to quickly choose tapping drills.

Try it for FREE! Download the DEMO
(PC version)
Tap Drill Charts
PC and Windows tablet version screenshot
Mobile version screenshots
Metric tap drill chart
Click the top down arrow to choose the thread type. Unified inch, ISO metric, taper pipe threads are available. Click the other down arrow and use the drill chart 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 inch threads and vice versa. 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.