calc318
ACI 318-19 Equation Calculator
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Solve all 175 equations from ACI 318-19 Appendix C, instantly, in US Customary Units.
Calc318 turns the equations from ACI 318-19 Appendix C into a live calculator. Pick an equation, enter your parameters, and get an answer the moment you type — beautifully rendered, with every variable clearly defined and unit-aware. No spreadsheets, no hand calcs.
calc318 requires an auto-renewable subscription. Start your 7-day free trial — no charge until the trial ends, and you can cancel anytime. After the trial, your subscription continues at $12.99/year or $2.99/month. Manage or cancel anytime in Settings → Apple ID → Subscriptions.
See more than just a number. Tap any input to open an interactive chart that shows exactly how your result responds as that parameter changes — with a draggable point and a family of curves for the other key variables, so you understand the behavior of the equation, not just one data point.
FEATURES:
- Live computation for all 175 ACI 318-19 equations, fully unit-aware.
- Professionally formatted equations with LaTeX-quality rendering.
- Interactive sensitivity graphs — drag a point and watch the result update in real time.
- Compare curves across multiple parameter values to see trends at a glance.
- Complete variable descriptions and units for every input.
- Smart search by section number, chapter, keyword, or variable.
- Recents tab to jump back to equations you use most.
- Clean, intuitive interface designed for engineers.
Whether you're checking a calculation, running a quick sensitivity study, or referencing design provisions, calc318 gets you the answer — and the insight behind it — in seconds.
Privacy Policy: https://aiosciv.com/calc318/
Terms of Use (EULA): http://www.apple.com/legal/itunes/appstore/dev/stdeula
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The developer, ARTIFICIAL INTELLIGENCE OPTIMIZATION AND SOFTWARE AIOS LLC, 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
- Provider
- ARTIFICIAL INTELLIGENCE OPTIMIZATION AND SOFTWARE AIOS LLC
- Size
- 17.5 MB
- Category
- Productivity
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- calc318 Pro Monthly ₱ 199.00
- calc318 Pro Yearly ₱ 799.00
- Copyright
- © 2026 Artificial Intelligence Optimization and Software AIOS LLC
