Machinist Calc Pro 2

29 reviews
Content rating
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About this app

The Machinist Calc Pro 2 machining calculator now includes materials and tool settings combined with DOC and WOC to solve all your speed and feed calculations for face, end or slot milling plus turning, drilling and boring. And while perhaps obvious, if you change from an Android device to an iPhone or iPad, you WILL need to buy a new license as they are incompatible.

This machining calculator has more complete Thread data than the Machinery's Handbook, including step-saving Thread and Drill Size chart look-ups, speeds and feeds, right triangle solutions, bolt patterns and much more.

The Machinist Calc Pro 2 machining calculator is ideal for machining pros and machine shop owners who want to increase productivity and profits in the design, layout and set-up stages of production and reduce wear and tear on costly cutting tools.

Spend more time machining and less time looking up specs and data in books, on charts or in computer programs. A must-have for all machinists and machine shops.

• Created by Calculated Industries, the originator of the award-winning Construction Master calculators
• Built-in help, just press and hold a key
• All the functionality and solutions of the handheld Machinist Calc Pro 2 calculators and optimized for the Android device user
• Entry Editing Backspace Key – with a swipe of a finger (left - to - right)
• A complete User’s Guide is available free at

• NEW - Machining-specific keys to enter or calculate Surface Feet per Minute (SFM), Inches per Tooth (IPT), Inches per Minute (IPM), Inches per Revolution (IPR), # of Teeth, Depth of Cut (DOC), Width of Cut (WOC) and Length of Cut (LOC)
• NEW - Materials - Choose from 20 popular Materials
• NEW - Processes - Face Milling, End Milling, Slot Milling, Turning, Boring, Drilling
• NEW - Tools - High Speed, Carbide and High Performance
• Speeds and Feeds - Calculate for Milling, Turning and Drilling; Spindle Speed (RPM), Feed Rate (IPM), Cut Speed, Cut Feed, Feed per Tooth, Number of Teeth and Radial Chip Thinning (RCT) adjustment factor with the Speeds and Feeds functionality
• Thread Size - Enter numeric, fractional or metric thread sizes and display tap, roll tap, close and free fit drill sizes. Display pitch, major and minor diameters
• Drill Point - Enter the cutting angle and Drill Size and calculate the Drill Point cut depth
• Drill Size - Enter numeric, letter, fractional or metric Drill Size and display the closest fitting Drill Size and scroll through available drill sizes
• 3-Wire Measure - Enter Wire Size (or use calculated Best Wire size) and 3-Wire Measurement to calculate pitch diameter
• Trigonometric Functions - Sine, Cosine, Tangent, Arcsine, Arccosine, Arctangent
• Right Triangle Math - Enter, calculate Angle, Hypotenuse, Opposite and Adjacent side lengths
• Bolt Pattern Hole Layouts - enter start angle, number of bolts, diameter and optional x, y offset; calculate x and y coordinates. Find center-to-center spacing for bolt pattern layouts

• Thread Classification Tables
◦ U.S.
- Internal (3) 1B, 2B, 3B
- External (3) 1A, 2A, 3A
◦ Metric
- Internal (14) 3G-9G and 3H-9H
- External (28) 3g-9g, 3h-9h, 3e-9e, 3f-9f
• U.S. and Metric Unit Entries and Conversions
◦ Decimal Inches/mils
◦ Feet-Inch-Fractions
◦ m, mm, cm
◦ Area, Volume and Weight
• Works as a Standard Calculator
• Calculate for Milling, Turning, Drilling & much more.

Machinist Calc® is a registered trademark of Calculated Industries, Inc.
Updated on
Aug 25, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
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Ratings and reviews

29 reviews
A Google user
March 1, 2019
Still figuring out the various features, but already liking the tapping drill size lookup. One feature I would like to have is an ability to select metric by default. E.g. I want "6" and "Thread Size" to mean metric M6 thread, not #6 imperial thread. Currently you have to press "6" "mm" "Thread Size" to set M6. As I work with metric system 99% of the time, defaulting to "mm" mode would be a great improvement in terms of reducing key taps. (Unit Format: Metric setting only applies to display, not entry).
8 people found this review helpful
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Calculated Industries
March 1, 2019
Thank you Gene. Great feedback. The Unit preference does change the thread tolerance class to a metric one. However, you are correct, as we support the different thread size types, unitless thread size entry is assumed numeric. Thanks again for the suggestion, we appreciate it!
Christopher Meador
May 27, 2023
Fantastic app. Feeds and speeds gives you a good starting point to adjust from.
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Calculated Industries
May 30, 2023
Thanks for your review! Please recommend our app to your friends, and don’t hesitate to call us at +18008548075 if you have any questions.
A Google user
June 22, 2019
The Calculations are great for Baseline Startimg points for Feeds, Speeds, Depth of Cut & Material. However it badly needs Insert Coatings calculations.
9 people found this review helpful
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Calculated Industries
June 24, 2019
Thank you Ryan! Please reach out to us at and provide more details on your feature request, we appreciate it and thank you for your time!

What's new

updated target SDK to 33
fixed font overlap on keys (Thread Size, Conv, 1/1000")