Torque Wrench Guide
Quick bolt torque calculator
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Instantly calculate the optimal tightening torque for bolts! Supports mm/inch, various materials, and custom friction coefficients. A simple tool for mechanics and DIY.
"Torque Calculator" is an ultra-simple tool that helps you quickly find the estimated tightening torque for various bolts.
Whether you are working on cars, motorcycles, bicycles, or doing DIY projects, this app instantly provides you with a theoretical torque value when you are unsure how tight a bolt should be.
[Key Features]
・Simple Mode: Just select the bolt diameter, strength, and lubrication status for an instant calculation!
・Advanced Mode: Direct input for custom torque coefficients and target preload.
・Unit Switching: Easily toggle between millimeters (mm) and inches (inch).
・Custom Input: Enter custom values for non-standard bolt diameters.
Designed to be straightforward and distraction-free, making it the perfect companion for your garage or workshop.
[Disclaimer & Important Notice]
The "target torque" calculated by this app is a theoretical estimate based on standard mechanical engineering formulas. Actual appropriate torque values can vary significantly due to factors such as individual bolt variations, rust, degradation, lubrication, temperature, and tool calibration.
When working on critical safety components (e.g., cars, motorcycles, bicycles, structural engineering), always prioritize the manufacturer's specified torque values found in official service manuals.
The developer assumes no liability for any bolt breakage, parts damage, accidents, injuries, or any other losses resulting from the use of this application's calculations. Please use this tool at your own risk and with utmost attention to safety.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Minor bug fixes and improvements.
The developer, Shota Yamada, 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 Used to Track You
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Data Linked to You
The following data may be collected and linked to your identity:
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Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shota Yamada
- Size
- 4.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
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- Copyright
- © 2026 Shota Yamada