Machinist's Calculator

Calculator for Machinists and CNC Programmers

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.
Windows version
Machinist's Caclulator
Mobile version
Drill chart list in Machinist's Calculator
Machinist's Calculator for mobiles
Tap here for links to Machinist's Calculator for mobile devices.

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. You may use the "Inch" and "Metric" options to convert values shown between Inch and Metric measurements.

To download the free, fully functioning demo to your PC, go to the Machinist's Calculator web site on your Windows computer. Explore all of the Machinist's Calculator's time saving functions.You'll spend a lot less time leafing through reference books!