This professional mechanical design tool helps engineers and enthusiasts calculate and optimize various gear parameters. It offers accurate calculations for different gear types, custom parameter input, and real-time design previews.


6+ similar apps compared and reviewed
Whether you want more options like Spur Gear Calculator or a completely different take on the same concept, our curated list of 6+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.


This professional mechanical design tool helps engineers and enthusiasts calculate and optimize various gear parameters. It offers accurate calculations for different gear types, custom parameter input, and real-time design previews.



Calculate the radius of an arch by inputting its width and height. This utility app saves your data for future reference, making it a handy tool for construction professionals.








This app provides advanced tools for calculating and visualizing earth measurements, including curvature, horizon distance, and drop distance. It features a redesigned interface with precision mapping, data persistence, and a knowledge hub with research resources.


This utility calculates propeller performance metrics like pitch, gear ratio, RPM, slip, and speed. Input any four values, and the app computes the fifth, helping users understand the relationship between propeller design and boat performance.


This tool assists watchmakers in diagnosing issues within watch gear trains. By inputting tooth counts and movement details, it calculates turn times, tooth passage, and other metrics to pinpoint the source of amplitude irregularities shown on a TimeGrapher trace.