Impressive
Definitely something I need in the shop
Issues
Text sits over the dimensions, can’t see data for thread depth a print out of thread data probably quicker.
No inch option for hole making..
The entire world doesn’t use metric drills.

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.
4.0.0
November 24, 2025
- Improved navigation and performance
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.
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.
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.
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.
Yes, Thread Calculator contains advertisements. As a free application, ads are displayed to support its development and continued availability.
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.
Thread Calculator is available for iPhone, iPad, and iPod devices. It is designed to run on Apple's iOS ecosystem.
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.