ToleranceLab
Interference Fit Calculator
Only for iPhone
$2.99 · Designed for iPhone. Not verified for macOS.
iPhone
Instantly check ISO fit results with guided hole/shaft class selection, clear visualizations, and press‑fit force estimates.
ToleranceLab helps engineers pick ISO 286 fits and understand what those selections mean in the real world. Enter a nominal size, choose hole- or shaft-basis classes, and get clearance/interference results with a simple visual that labels the resulting diameters.
Use the guided fit intent picker to match common engineering goals (free running, locational, transition, or interference) and jump into the built-in reference guide for definitions and ISO fit recommendations. When a press fit is detected, ToleranceLab estimates contact pressure, hoop stress, and axial force using selectable compliance models and material data, with warnings and assumptions shown alongside results.
Switch between metric and imperial units, explore fit classes quickly, and keep a practical reference at hand for design and manufacturing decisions.
Disclaimer: ToleranceLab is provided as a general engineering reference tool only. All results and calculations are estimates based on standard formulas, assumptions, and user-supplied inputs. The app does not provide professional engineering, design, or safety advice and is not a substitute for independent analysis, validation, or review by a qualified engineer. To the maximum extent permitted by law, the developer assumes no liability for errors, omissions, or outcomes resulting from the use of this app. Users are solely responsible for verifying results and ensuring suitability for their specific application and compliance with applicable standards and regulations.
Ratings & Reviews
The developer, Orlando Cossia Castiglioni, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Orlando Cossia Castiglioni
- Size
- 1 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
French and 4 more
- French, German, Italian, Japanese, Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Orlando Cossia Castiglioni
