---
title: "calc318 - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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 param"
---

# calc318 — United States
> ACI 318-19 Equation Calculator

![calc318 App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/98/cb/98/98cb987e-f46b-c776-9ffb-788f5d6d2319/IconComputeV002-0-0-1x_U007ephone-0-1-sRGB-85-220.png/434x0w.png)

**Developer:** [ARTIFICIAL INTELLIGENCE OPTIMIZATION AND SOFTWARE AIOS](https://apptail.io/developer/artificial-intelligence-optimization-and-software-aios-laVBcb)
**Category:** Productivity
**Rating:** 5.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** com.aiosciv.equationCodeCalculator
**Store:** Apple App Store
**Country:** United States
**Version:** 1.1 (released 2026-09-19)
**Original Release:** 2026-06-22
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6763030413)
**AppTail Page:** [https://apptail.io/app/calc318-dbZA/united-states](https://apptail.io/app/calc318-dbZA/united-states)

## calc318 Description
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: 
Terms of Use (EULA): 

## calc318 Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/39/ff/88/39ff88bb-0f66-b698-1e41-22e378a220ad/Image1.png/1320x2868.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/5b/21/0d/5b210d4d-fc29-4d58-b445-e7bb110ad6c3/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-06-01_at_22.01.41.png/1320x2868.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/20/2e/e9/202ee901-e6a2-a669-5bfe-739cea4db9c7/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-06-01_at_22.03.25.png/1320x2868.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a5/b6/d9/a5b6d934-b16e-b905-6c06-be5faec26c63/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-06-01_at_22.03.44.png/1320x2868.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/f9/34/e8/f934e858-a92f-6bed-5f32-e7dd574a735c/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-06-01_at_22.02.51.png/1320x2868.png)

## calc318 Rating Breakdown in United States
- 5 stars: 1 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)






## calc318 Available In
- [United States](https://apptail.io/app/calc318-dbZA/united-states)
- [Bahrain](https://apptail.io/app/calc318-dbZA/bahrain)
- [Canada](https://apptail.io/app/calc318-dbZA/canada)
- [Egypt](https://apptail.io/app/calc318-dbZA/egypt)
- [Hong Kong SAR China](https://apptail.io/app/calc318-dbZA/hong-kong)
- [India](https://apptail.io/app/calc318-dbZA/india)
- [Sri Lanka](https://apptail.io/app/calc318-dbZA/sri-lanka)
- [Nigeria](https://apptail.io/app/calc318-dbZA/nigeria)
- [Philippines](https://apptail.io/app/calc318-dbZA/philippines)
- [Saudi Arabia](https://apptail.io/app/calc318-dbZA/saudi-arabia)
- [Thailand](https://apptail.io/app/calc318-dbZA/thailand)
- [Taiwan](https://apptail.io/app/calc318-dbZA/taiwan)
- [United Arab Emirates](https://apptail.io/app/calc318-dbZA/united-arab-emirates)
- [Uzbekistan](https://apptail.io/app/calc318-dbZA/uzbekistan)

---

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