Thread calculator
Thread calculator Summary
Thread calculator is a mobile Android app in Books And Reference by GSR Gustav Stursberg GmbH. Released in Jan 2018 (8 years ago). It has about 201.2K+ installs and 1.9K ratings with a 4.62★ (excellent) average. Store metadata: updated Nov 21, 2025.
Recent activity: -131622 installs this week (1.7K over 4 weeks) showing steady growth , and 6.00 new ratings this week View trends →
Store info: Last updated on Google Play on Nov 21, 2025 .
4.62★
Ratings: 1.9K
Screenshots
App Description
The official GSR Gustav Stursberg GmbH 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.
Because: Precision is in the details. Since 1889.