# Machinist's Calculator — Speed & Feed Rate Calculator > Machinist's feed and speed rate calculator for SFM, RPM, IPM, and FPT. (iPhone/iPad app by Tianna Henry-Lewis.) - Source: https://appshunter.io/ios/app/machinists-calculator/id1300015839 (this page in markdown: same URL + `.md`) - Developer: [Tianna Henry-Lewis](https://appshunter.io/developer/1222798597) - Category: Utilities, Reference - Price: Free - Rating: 3.90/5 from 64 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 10.3 · 17 MB - Languages: American English - Released: 2017-10-24 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/machinists-calculator/id1300015839/reviews.md ## What is Machinist's Calculator? A simple to the point app for calculating feed rates and speeds for machinists. Currently able to calculate the following with more options on the way! - Surface Feet per Minute (SFM) - Revolutions per Minute (RPM) - Inches per Minute (IPM) - Feed per Tooth (FPT) Leave a review with what you would you like to see in future versions. ## Key features - Surface Feet per Minute (SFM) calculation - Revolutions per Minute (RPM) calculation - Inches per Minute (IPM) calculation - Feed per Tooth (FPT) calculation - Simple and direct interface ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/machinists-calculator/id1300015839/reviews.md ### 2/5 — Will not work on my iphone 8 *2019-10-15* Would like to use this app on my iphone 8 but keeps not loading. I down load the app and when i open it it will not open ### 3/5 — Very handy to have *2019-08-29* But its missing MRR. If it had this id give it a 4 star ### 3/5 — Simple but what I needed *2019-04-18* Just calculates feeds and speeds, but gives you the option to calculate using different combinations of known information. Not clever enough to cope with variable tool or stock materials. You have to get the feed per tooth for any material and cutting rpms from charts from the company that made the tool. At least that is cutter specific, taking into account geometry and cutter material. ### 1/5 — Thought it would be better *2019-01-02, version 5.0* I thought that I’d be able to find ideal material cutting rates but alas not... ### 5/5 — clean and easy! *2018-12-20* I bought two apps for the same reason, this one is the winner, simple, easy to use and most efficient! ### 1/5 — Useless *2018-12-10, version 5.0* Where’s the metric??! Useless. ### 1/5 — Metric? *2018-10-20, version 5.0* Can’t find how to change to metric config ### 5/5 — New layout *2018-01-31* I submitted a request to update or change the layout and they totally made it better. Thanx! ## Frequently asked questions about Machinist's Calculator ### What calculations can Machinist's Calculator perform? Machinist's Calculator can currently compute Surface Feet per Minute (SFM), Revolutions per Minute (RPM), Inches per Minute (IPM), and Feed per Tooth (FPT). The developer plans to add more calculation options in future updates. ### Is Machinist's Calculator free to use? Yes, Machinist's Calculator is available for free. There are no in-app purchases or advertisements within the application. ### What devices is Machinist's Calculator compatible with? Machinist's Calculator is compatible with iPhone, iPad, and iPod touch devices. It is designed for iOS users. ### How often is Machinist's Calculator updated? The app was last updated on January 30, 2018, to version 5.0. Previous updates were released periodically, but the current update frequency is not specified. ### What is the age rating for Machinist's Calculator? Machinist's Calculator has an age rating of 4+. This indicates it is suitable for users of all ages. ### What do users think of Machinist's Calculator? Machinist's Calculator has an average rating of 3.9 stars from 64 ratings. User reviews often suggest desired features for future updates. ### Does Machinist's Calculator have ads? No, Machinist's Calculator does not contain advertisements. It is a completely ad-free application. ### Can I suggest new features for Machinist's Calculator? Yes, the developer encourages users to leave a review with suggestions for features they would like to see in future versions of Machinist's Calculator. ## Version history (last 5 releases) ### 5.0 — 2018-01-30 Updated layout due to user feedback. ### 4.0 — 2017-11-23 * Added a Reset button for the entry to be cleared quickly to allow for multiple calculations faster ### 3.0 — 2017-11-13 *Optimized Calculation Process *Fixed Bug Issue with Rate App Button - Now easier to provide your feedback. ### 2.0 — 2017-11-02 Audio Feedback - Easier to detect when a selection has been made. ### 1.0 — 2017-10-24 No release notes. ## Apps similar to Machinist's Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [GPS Race Timer](https://appshunter.io/ios/app/gps-race-timer/id1340496243) | 4.5 (2,612) | Free | Utilities | | [Infinite Name Generator](https://appshunter.io/ios/app/infinite-name-generator/id1566818987) | 3.0 (1) | Free | Utilities | | [Panecal Plus Sci. 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