iPhone Screenshots


CNC Machinist Calculator Pro is a machining calculator designed for manufacturing engineers, machinists, CNC operators, tool & die makers, and at home hobbyists. CNC Machinist Calculator Pro is great for CNC programmers or machine operators who need to make quick calculations on the fly.

This CNC machining calculator includes the following features:

1. Turning Calculators for lathe operators
2. Milling Calculators for mill operators
3. Drilling Calculators
4. Gun drilling Calculators
5. Thread Calculators
6. True Position Calculators
7. Bolt Pattern Calculators
8. Surface Finish Calculators
9. Drill & Tap charts
10. Thread Pitch charts
11. Centerdrill dimensions
12. Unit convertor
13. Hardness conversions
14. G-codes
15. M-codes
16. Blue Print Geometric Tolerance Descriptors - GD&T
17. SFM Data for over 170 materials
18. Tap Drill Calculator for roll form & cut taps
19. Various Geometric calculators
20. Triangle Solver
21. CNC Keyway Broach calculator
22. Thread over wires calculator
23. Thread data for 60° threads
24. Thread data for NPT threads (National Pipe Threads)
25. Lathe Taper calculator
26. Online forum
27. More to come...

Check us out at www.cncdirt.com

What's New

Version 12

Now you can easily convert inch thread data to metric & metric data to inch in the "Thread Data" section.
Also flattened some bugs

Ratings and Reviews

4.6 out of 5
116 Ratings
116 Ratings

Button presses are abysmal


There are quite a few good utilities here though the UI has one major flaw and several areas that need improvement. The major flaw is that it takes multiple presses on the buttons for data entry. A friend recommended the app to me but warned me of this problem. I didn’t realize how serious it was. Also in some case the button location is not correct so one has to press slightly above (or below) the location of the button to get the correct entry. Really, THIS NEEDS TO GET FIXED!! This app is not worth the money until this problem is resolved! No other app I have ever used has a basic data entry problem like this, please fix it. The app would get four stars if this problem was fixed. I tend not to use it because of this. The other problems are order-of-event issues with the UI, but they pale in comparison the the button entry issue.

Excellent Resource


I tried several similar apps before purchasing this one. Shane has done a great job of making sure the app has helpful and easy to use tools. When I suggested an enhancement, it was added within a few days. I recommend it to anyone who asks. Hands down one of the best apps I've purchased.


Eimer mh

I got the app mainly to figure triangles since I am weak on trigonometry. It does that very easily and easy to figure. There are many other tasks it can perform that after seeing I can expect will be useful. I think the 9 or 10 dollars it cost was well spent.


Shane Anderson
43.1 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Plucked Studios 2017


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.