ACT Calculator Program & Model Eligibility Checker
Determine if your specific calculator model is allowed on the ACT exam based on the latest rules.
Check Your Calculator
Enter the full model name as written on your calculator.
Policy Checks
What Are Calculator Programs for the ACT?
The term “calculator programs for the ACT” refers to two related concepts: the official ACT calculator policy that dictates which devices are permitted, and the specific software programs that can be installed on a graphing calculator. The ACT has strict rules to ensure fairness and prevent academic dishonesty. While many graphing calculators are allowed, some models are explicitly banned, particularly those with a Computer Algebra System (CAS). Understanding these rules is critical for test day success.
This tool helps you check your calculator model against the ACT’s criteria. Moreover, for students with approved graphing calculators like the TI-84, the term also involves understanding which user-added calculator programs for the ACT (like quadratic solvers or triangle formulas) are permissible, as programs that replicate CAS functionality are forbidden.
The ACT Calculator Policy Formula Explained
There isn’t a mathematical formula for the ACT calculator policy, but rather a set of logical rules. The core principle is that a calculator should be a tool for computation, not for solving problems conceptually. Your calculator’s eligibility is determined by the following checks.
| Variable (Feature) | Meaning | Permitted Status | Typical Range / Examples |
|---|---|---|---|
| CAS Functionality | Ability to solve algebraic equations symbolically. | Prohibited | TI-89, TI-92, TI-Nspire CAS, HP Prime |
| QWERTY Keyboard | A typewriter-style keyboard layout. | Prohibited | Any device with a QWERTY keyboard |
| Graphing Capability | Ability to plot functions and analyze graphs. | Permitted | TI-84 Plus, TI-Nspire CX (non-CAS), Casio FX-9750GII |
| External Power | Requires an electrical outlet to function. | Prohibited | Calculators with power cords |
| User Programs | Programs added by the user to perform tasks. | Permitted (with restrictions) | Must be single-purpose, non-CAS, and under 25 lines of code. |
Practical Examples
Example 1: A Prohibited Calculator
- Input: TI-89 Titanium
- Analysis: The “TI-89” model is explicitly listed by the ACT as prohibited because it contains a built-in Computer Algebra System (CAS).
- Result: PROHIBITED. This calculator cannot be used on the ACT under any circumstances.
Example 2: A Permitted Calculator
- Input: TI-84 Plus
- Analysis: This model is a standard graphing calculator and does not have a CAS. It is one of the most common and widely accepted calculators for the ACT. For more info, see our guide on ACT math tips.
- Result: ALLOWED. This calculator is fully permitted for use on the test.
How to Use This ACT Calculator Eligibility Checker
Using this tool is straightforward and designed to give you a quick, clear answer about your device.
- Find Your Model Number: Locate the exact model number on the front or back of your calculator (e.g., “TI-Nspire CX II”, not just “Texas Instruments”).
- Enter the Model: Type the full model number into the input field above. The checker is not case-sensitive.
- Review the Result: The tool will instantly provide a status: ALLOWED, PROHIBITED, or ALLOWED WITH MODIFICATIONS. It will also show which specific rules from the ACT calculator policy your model passed or failed.
- Understand the Explanation: Read the detailed explanation to know why your calculator received its status, which is crucial for avoiding issues on test day.
Key Factors That Affect ACT Calculator Eligibility
Several key features can immediately disqualify a calculator. When evaluating if your device is a valid part of your ACT prep courses toolkit, watch out for these six factors:
- Computer Algebra System (CAS): This is the most common reason for a calculator to be banned. CAS can perform symbolic algebra, which is against ACT rules.
- QWERTY Keyboard: Any device with a typewriter-style keyboard is prohibited to prevent text communication.
- Need for an Outlet: Calculators that cannot be operated without a power cord are not allowed.
- Stylus or Pen-Based Input: Devices that use a stylus for input are generally prohibited.
- Communication Ability: Any calculator that can communicate wirelessly (e.g., via infrared or Wi-Fi) must have that feature disabled or covered.
- Stored Programs or Documents: While some programs are allowed, those that perform CAS functions or contain extensive notes must be removed. It is wise to clear the memory before the test.
Frequently Asked Questions (FAQ)
1. Are calculator programs for the ACT allowed at all?
Yes, but with strict limitations. Programs must be single-purpose (e.g., a quadratic formula solver), written in the calculator’s native language, and cannot perform CAS functions. They also have a length limit. Check out our ACT practice tests to see where such a program might be useful.
2. What is the difference between a TI-Nspire CX and a TI-Nspire CX CAS?
The TI-Nspire CX (non-CAS) is permitted on the ACT. The TI-Nspire CX CAS is prohibited. The “CAS” in the name stands for Computer Algebra System, which is the specific feature the ACT bans.
3. Can I use my phone’s calculator app?
No. All phones, tablets, smartwatches, and laptops are strictly prohibited from use during the test.
4. What if my calculator has an infrared port?
According to the official ACT calculator policy, you must cover the infrared port with heavy, opaque tape (like duct tape or electrician’s tape).
5. Do I need to clear my calculator’s memory before the test?
It is highly recommended. Test proctors can inspect your calculator, and if they find prohibited programs or documents, you could be dismissed from the test. It’s better to be safe and start with a clean slate.
6. Is a TI-84 an approved ACT math calculator?
Yes, all versions of the TI-84 (Plus, CE, etc.) are approved and are among the most popular choices for the ACT. This is a key difference in the ACT vs SAT comparison, as policies can differ slightly.
7. What happens if I bring a prohibited calculator?
You will not be allowed to use it. If you are found using one during the test, you will be dismissed, and your score will be canceled.
8. Can all questions be solved without a calculator?
Yes, the ACT states that every math question can be solved without a calculator. However, using an approved calculator efficiently can save significant time.