Machinist Calc Pro

Machinist Calc Pro

Machining Math Calculator

3 ratings
18 reviews
$24.99

Details

  • Released
  • Updated
  • January 31, 2013
  • June 4, 2026

Features

Machinist Calc Pro screenshot #1 for iPhone
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Machinist Calc Pro screenshot #8 for iPhone
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About

This app provides machining professionals with a comprehensive set of tools for calculations related to speeds, feeds, threads, and trigonometry. It aims to increase productivity and reduce tool wear by offering quick access to essential data, replacing the need for physical charts and books.

Speeds and Feeds calculations
Thread size and drill size look-ups
Trigonometric functions
Right triangle math
US and Metric unit conversions
Built-in help
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What's New in Machinist Calc Pro

10.3.0

June 4, 2026

Compliance updates.

User reviews

Conversions

Why did you completely ruin the conversion feature in the Machinist Calc app? It worked wonderfully, input a number followed by IN or MM and then press the opposite IN or MM to get the result. I used this ALL the time, now I regret buying this app.

Construction master

I have used the actual construction master calculator for decades and now that it’s an app. Less gadgets to carry!! The best . Try all their apps

Does not work anymore

I bought the calculator and then the app.
The app worked at first but then they updated it.
Now it doesn't work at all, good thing I have the handheld calculator. Would rate this a negative star but it doesn't go down that low.

mm to inch conversion

This is a function I use literally hundreds of times a day when looking at blueprints. Whatever update occurred caused this to no longer work. For example I should be able to press 1 then inch then mm and get 25.4 as a solution. Now it just changes from 1 inch to 1 mm. Was a really great app with handy features. Not sure now what all has been changed. Please restore functionality. Would have been 5 stars had I not lost my favorite feature. Still gets a 4 though. I've used it for 6 months with no other issues.

***Still not fixed. Down to 2 stars. Luckily I have the calculator version in my toolbox for redundancy. The new version works but it's a shame you will not fix this one for people who already have it.
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No longer works!

I liked this app before the latest update. It could have had a few features to make things easier to enter like thread data. You have to remember a lot of key strokes in the correct order.

Since the update, thread data doesn't work. Unit conversion doesn't work as well as other common features. It now has about the same functionality as the Apple one included with your phone but expensive Apple.
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Developer apps

FAQ

What is Machinist Calc Pro?

Machinist Calc Pro is a specialized calculator app designed for machining professionals. It offers a wide range of functions to assist with calculations for speeds, feeds, thread sizes, and trigonometric problems, aiming to improve efficiency in the workshop.

Is Machinist Calc Pro free?

No, Machinist Calc Pro is a paid application. It is priced at $24.99 and does not feature advertisements or in-app purchases.

What kind of machining calculations can Machinist Calc Pro perform?

Machinist Calc Pro can calculate speeds and feeds for milling, turning, and drilling, determine thread sizes and corresponding drill sizes, calculate drill point depths, perform 3-wire measurements, and solve trigonometric functions and right triangle math.

Does Machinist Calc Pro support both US and Metric units?

Yes, Machinist Calc Pro supports both U.S. and Metric unit entries and conversions. This includes decimal inches/mils, feet-inch-fractions, meters, millimeters, centimeters, and conversions for area, volume, and weight.

What devices is Machinist Calc Pro compatible with?

Machinist Calc Pro is designed for iOS devices, including iPhone, iPad, and iPod. Please note that licenses are not transferable between iOS and non-iOS devices.

How often is Machinist Calc Pro updated?

The latest version of Machinist Calc Pro is 10.2.3, which was last updated on January 21, 2023. Updates typically include bug fixes and feature enhancements.

What is the age rating for Machinist Calc Pro?

Machinist Calc Pro has an age rating of 12+. This indicates it is suitable for users aged 12 and older.

Where can I find a user guide for Machinist Calc Pro?

A complete user's guide for Machinist Calc Pro is available for free on the developer's website at www.calculated.com.