Calculate essential dimensions for spur gears and pinions using diametral pitch or module. This tool provides outside diameter, center distance, and ratio for specific gear types.
Spur Gear Calculator by SpiralArm Consulting Limited




250+ iOS apps curated and reviewed
With an average user rating of 3.9★, the spur gear calculator category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 3.7★ (3) | No | No | May 2026 | |
| 2 | Free | 5.0★ (1) | No | Yes | May 2026 | |
| 3 | Free | — | Yes | Yes | Jul 2026 | |
| 4 | Free | 4.7★ (60K) | No | No | Aug 2026 | |
| 5 | Free | — | No | No | May 2026 | |
| 6 | Free | — | No | No | May 2026 | |
| 7 | Free | 2.5★ (2) | No | No | May 2026 | |
| 8 | $2.99 | 3.4★ (5) | No | No | Jun 2026 |




Calculate essential dimensions for spur gears and pinions using diametral pitch or module. This tool provides outside diameter, center distance, and ratio for specific gear types.


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.








This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.






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This app helps track cyclists calculate gear ratios and speeds. It supports a wide range of chainring and cog sizes, and can determine optimal gear changes. Results can be displayed in Imperial or Metric units.


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This app offers a versatile calculator experience with both standard and scientific modes. Customize its appearance, use it in any orientation, and access additional tools like a notes tab and calculation history. It's designed for students and professionals needing accurate calculations.






Perform a variety of calculations related to vehicle drivelines and engines. This tool helps users get the most out of genuine Spicer parts with specialized calculators for RPM, fuel savings, and more.