Thread Calculator is an Android-based app developed by GSR Gustav Stursberg GmbH, a renowned manufacturer of high-quality thread cutting tools. The app is available for free in the Education & Reference category under the Books subcategory. This outstanding app includes a calculator for thread cutting, cold forming, and thread repair for various units such as M, MF, UNC, UNEF, UNF, UNR, UNS, NPT, NPTF, NPSC, NPSF, NPSL, NPSM, BA, BSP, BSF, BSW, BSPP, TR, and TRF.

The app is designed to provide you with the desired measures for the tap hole and bolt selection in no time. You can easily select the thread type, nominal size, and pitch to get the matching diameter for your project. This feature saves you precious time that you would have spent searching for internal and external thread dimensions in tables. Additionally, this app is still under development, and new features will be added soon.