# Thread Calculator — Data for metal working > Metalworking thread dimension calculator for various thread types and units. (iPhone/iPad app by GSR Gustav Stursberg GmbH.) - Source: https://appshunter.io/ios/app/thread-calculator/id1559560290 (this page in markdown: same URL + `.md`) - Developer: [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) - Category: Productivity - Price: Free - Rating: 4.30/5 from 13 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 25 MB - Languages: American English - Released: 2021-07-19 - Data updated: 2026-06-07 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews.md ## What is Thread Calculator? The app includes: - A calculator for thread cutting for the following units: M, MF, UNC, UNEF, UNF, UNR, UNS, NPT, NPTF, NPSC, NPSF, NPSL, NPSM, BA, BSP, BSF, BSW, BSPP, TR, and TRF - A calculator for cold forming - A calculator for thread repair You want to know which tap hole you should drill for threading or which bolt you should use? With this app, you will find the desired measures in no time: Simply select the desired thread type, nominal size, and pitch and you will get the matching diameter for your project. This saves precious time you would have spent tediously searching for internal and external thread dimensions in tables. As this app is still in its development phase, new features will follow soon, so stay tuned! GSR Gustav Stursberg GmbH is a manufacturer for high-quality thread cutting tools with 130 years of operational experience in the area of threading tool production. The product portfolio includes a wide selection of tools for different areas of application. GSR taps, twist drills, round dies, and tool holders are manufactured to the highest quality standards in our own production facilities. The constant quality control during the production process guarantees a consistent good quality in all national as well as international production facilities. This requires enormous precision, which is reflected by our tools. Precision is in the details. Since 1889. ## Key features - Thread cutting calculator for multiple units - Cold forming calculator - Thread repair calculator - Tap hole and bolt diameter calculation - Saves time compared to tables ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews.md ### 5/5 — Impressive *2025-03-03* Definitely something I need in the shop ### 2/5 — Issues *2024-02-06* Text sits over the dimensions, can’t see data for thread depth a print out of thread data probably quicker. ### 2/5 — No inch option for hole making.. *2022-03-29* The entire world doesn’t use metric drills. ## Frequently asked questions about Thread Calculator ### What thread types does Thread Calculator support? Thread Calculator supports a wide range of thread types including M, MF, UNC, UNF, NPT, BSP, and many more. This comprehensive list ensures users can find the correct dimensions for most common threading applications. ### How does Thread Calculator help save time? Instead of manually searching through complex tables for internal and external thread dimensions, Thread Calculator provides instant results. Users simply input the desired thread type, nominal size, and pitch to get the matching diameter. ### Is Thread Calculator suitable for beginners? Yes, the app is designed to be user-friendly, allowing users to quickly find desired measures by selecting the thread type and size. This makes it accessible for both experienced professionals and those new to metalworking. ### What are the future plans for Thread Calculator? The app is currently in its development phase, and new features are planned to be added soon. Users are encouraged to stay tuned for updates and enhancements to the existing functionality. ### Does Thread Calculator have ads? Yes, Thread Calculator contains advertisements. As a free application, ads are displayed to support its development and continued availability. ### What is the rating of Thread Calculator? Thread Calculator has a strong user rating of 4.3 stars, based on 13 ratings. This indicates a generally positive user experience with the app's functionality. ### On which devices can I use Thread Calculator? Thread Calculator is available for iPhone, iPad, and iPod devices. It is designed to run on Apple's iOS ecosystem. ### How often is Thread Calculator updated? The latest version of Thread Calculator is 4.0.0, which was last updated on November 24, 2025. This suggests a commitment to ongoing development and improvements. ## Version history (last 4 releases) ### 4.0.0 — 2025-11-24 - Improved navigation and performance ### 3.1.0 — 2023-01-24 - Design optimized - New values and units added - Performance improved ### 3.0.1 — 2021-07-30 Performance improvements New language: italian ### 3.0.0 — 2021-07-19 No release notes. ## Apps similar to Thread Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [Hoffmann Machining Calculator](https://appshunter.io/ios/app/hoffmann-machining-calculator/id1450938067) | — | Free | Productivity | | [MechTab](https://appshunter.io/ios/app/mechtab/id553201101) | 4.1 (16) | Free | Productivity | | [Walter Feeds & Speeds](https://appshunter.io/ios/app/walter-feeds-and-speeds/id454963587) | 2.4 (8) | Free | Productivity | | [Walter Machining Calculator](https://appshunter.io/ios/app/walter-machining-calculator/id423564212) | 3.0 (5) | Free | Productivity | | [MoCoNC](https://appshunter.io/ios/app/moconc/id1574512474) | — | Free | Productivity | | [FSWizard](https://appshunter.io/ios/app/fswizard/id741521897) | 4.6 (47) | Free | Productivity | ## Related topics [gsr gustav stursberg gmbh](https://appshunter.io/ios/topics/gsr-gustav-stursberg-gmbh) · [gsr](https://appshunter.io/ios/topics/gsr) · [thread tracker 117](https://appshunter.io/ios/topics/thread-tracker-117) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-07.*