Calculate pipe offsets, weight, and fittings with precision. Features real-time updates, interactive 3D visualization, and multiple input modes for engineers and plumbers. Save and restore previous calculations.






10+ similar apps compared and reviewed
Flange Hole Marker Pro is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.











Calculate pipe offsets, weight, and fittings with precision. Features real-time updates, interactive 3D visualization, and multiple input modes for engineers and plumbers. Save and restore previous calculations.



This engineering tool accurately calculates and marks bolt hole positions on flanges for machinists and fabricators. It offers features for equispaced, angle-based, and equivalent hole counts, saving time and reducing manual errors in workshop settings.


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