ACT Calculator Policy Checker
Can you use your calculator on the ACT?
Is Your Calculator Permitted?
Enter your calculator’s model name below to check if it complies with the current ACT calculator policy.
Policy Summary & Visuals
The ACT has strict rules to ensure fairness. The table and chart below summarize the key points of the ACT calculator policy.
Prohibited Calculator Features
| Prohibited Feature | Description | Common Examples |
|---|---|---|
| Computer Algebra System (CAS) | Calculators that can solve algebraic equations symbolically. | TI-89, TI-92, TI-Nspire CAS, HP Prime |
| QWERTY Keyboard | Calculators with a lettered keyboard like a computer. | TI-92 Plus, Voyage 200 |
| Wireless Communication | Any device with Wi-Fi, Bluetooth, or infrared ports that cannot be disabled. | Cell phones, tablets, smartwatches |
| External Power | Calculators that need to be plugged into an electrical outlet. | N/A (most are battery-powered) |
| Noise or Tapes | Calculators that make noise (must be muted) or use paper tape (must be removed). | Printing calculators |
Breakdown of Common Calculator Types
What is the ACT Calculator Policy?
The ACT calculator policy is a set of rules established by ACT, Inc. to ensure fairness and test security during the mathematics portion of the ACT exam. This policy dictates which calculators are allowed, which are prohibited, and which require modification before being used on test day. Understanding the ACT calculator policy is crucial for any student preparing for the exam, as using a non-compliant device can lead to dismissal from the testing center and cancellation of scores.
Who Should Care About This Policy?
Any student planning to take the ACT must be familiar with the ACT calculator policy. While it’s technically possible to solve all ACT math problems without a calculator, doing so is highly inefficient. A permitted calculator is an essential tool for managing time and tackling complex calculations. The responsibility falls on the student to bring a working, approved calculator. Test administrators will not provide them.
Common Misconceptions about the ACT Calculator Policy
A frequent misconception is that any “graphing calculator” is allowed. This is false. High-end graphing calculators often include a Computer Algebra System (CAS), which is strictly forbidden by the ACT calculator policy. Another myth is that you need the most expensive calculator; in reality, a familiar scientific calculator is often more effective than an unfamiliar, complex graphing one. The core of the ACT calculator policy is about preventing unfair advantages, not about limiting access to basic calculation tools.
ACT Calculator Policy Rules Explained
Unlike a mathematical formula, the ACT calculator policy is a set of logical rules. The guiding principle is to allow tools for calculation while prohibiting those that can solve complex algebra problems automatically or that could compromise test security (e.g., by storing text or communicating wirelessly).
Step-by-Step Rule Breakdown
- Permitted by Default: Most four-function, scientific, and non-CAS graphing calculators are allowed. This includes popular models like the TI-84 Plus family.
- Prohibited by Feature: The policy explicitly prohibits any calculator with Computer Algebra System (CAS) functionality. This is the most common reason for a calculator being banned. Other banned features include QWERTY keyboards, wireless capabilities, and the need for an external power source.
- Requires Modification: Some calculators are permitted only if modified. For instance, if your calculator can store programs or documents, you must clear them. If it has an infrared port, it must be covered with opaque tape. If it makes noise, the sound must be turned off.
Variables of the Policy
The “variables” in the ACT calculator policy are the features of the calculator itself. This table explains what test administrators look for:
| Variable (Feature) | Meaning | Permitted Status | Typical Range/Examples |
|---|---|---|---|
| CAS | Computer Algebra System | Prohibited | TI-Nspire CAS, HP Prime, TI-89 |
| Graphing | Ability to plot functions (y=…) | Permitted | TI-83, TI-84, Casio fx-9750GII |
| Scientific Functions | Trigonometry (SIN, COS), Logs, Exponents | Permitted | TI-30XS, Casio fx-115ES |
| Keyboard Type | Input method | QWERTY keyboards are Prohibited | Standard numeric keypads are fine |
| Programs/Documents | Stored information | Permitted only if all content is removed | Games, notes, or CAS programs must be deleted |
Practical Examples (Real-World Use Cases)
Example 1: The Prohibited High-End Calculator
- Student’s Calculator: Texas Instruments TI-Nspire CX II CAS
- Input to Checker: “TI-Nspire CX II CAS”
- Output: Prohibited
- Interpretation: The “CAS” in the model name signifies a Computer Algebra System. The ACT calculator policy explicitly bans all calculators with CAS functionality because they can perform algebraic manipulations that are supposed to be tested. The student must acquire a different, non-CAS calculator for the exam.
Example 2: The Permitted Standard Graphing Calculator
- Student’s Calculator: Texas Instruments TI-84 Plus CE
- Input to Checker: “TI-84 Plus CE”
- Output: Permitted
- Interpretation: This is one of the most common calculators used for the ACT. It has powerful graphing and scientific capabilities but does not have a CAS. The ACT calculator policy allows this model. However, the student should ensure no prohibited programs (like games or notes) are stored on it, as proctors may check.
How to Use This ACT Calculator Policy Checker
This tool is designed to give you a quick and clear answer regarding your calculator’s compliance with the ACT calculator policy. Follow these simple steps:
- Locate the Model Name: Find the exact model name and number on the front or back of your physical calculator.
- Enter the Model: Type the full model name into the input field above. The more specific, the better.
- Review the Result: The tool will instantly provide one of three statuses: Permitted, Prohibited, or Review Needed.
- Read the Reasoning: The ‘Reasoning’ section explains *why* the decision was made, often referencing a specific rule from the ACT calculator policy, such as the presence of a CAS.
- Follow the Recommendation: The ‘Recommendation’ provides actionable advice, such as “You can use this calculator” or “You must find an alternative calculator.”
Key Factors That Affect ACT Calculator Policy Results
Several key factors determine whether a calculator is allowed. The ACT calculator policy is designed around these specific features:
- Computer Algebra System (CAS): This is the number one disqualifying feature. A CAS can manipulate variables, factor polynomials, and solve algebraic equations, which goes beyond simple calculation. The ACT tests these skills directly, so tools that automate them are banned.
- QWERTY Keyboard: Calculators with typewriter-style keyboards are prohibited. This rule prevents devices that could be used to store notes or communicate.
- Communication Capabilities: Any device that can communicate wirelessly (Bluetooth, Wi-Fi) is banned. This includes phones, tablets, and smartwatches. Even older calculators with infrared ports must have them fully covered with opaque tape.
- Programs and Documents: The ability to store programs is a gray area. While the calculator itself might be allowed (like a TI-84), you are responsible for removing all programs and documents before the test.
- Power Source: Calculators needing an external power cord are not allowed. Your device must be battery-operated, and you are responsible for ensuring it has enough power for the entire test. Bringing extra batteries is a good idea.
- Physical Modifications: Some calculators are allowed only with modifications. This includes removing paper tape from printing calculators or turning off any sound features.
Frequently Asked Questions (FAQ)
1. Can I use a TI-84 Plus on the ACT?
Yes, the TI-84 Plus, including the CE version, is one of the most popular and widely accepted calculators for the ACT. It does not have a CAS, making it compliant with the ACT calculator policy. Just make sure to clear any non-essential programs.
2. What happens if I bring a prohibited calculator?
If a test proctor discovers you have a prohibited calculator, you will likely be dismissed from the test, and your score will be invalidated. They will not provide a replacement.
3. Is a scientific calculator good enough for the ACT?
Absolutely. All math questions on the ACT can be solved without a calculator, so a good scientific calculator (like a TI-30XS) is more than sufficient and often faster for many students than a graphing calculator.
4. Why is CAS (Computer Algebra System) banned?
CAS is banned because it automates the algebraic and calculus-based problem-solving skills that the ACT is designed to measure. Using a CAS calculator would provide an unfair advantage.
5. Does the ACT provide a list of approved calculators?
The ACT does not provide a comprehensive “approved” list because there are too many models. Instead, they provide a “prohibited” list and a set of rules to follow. This tool helps interpret those rules for your specific model. Our Graphing Calculator Guide has more info.
6. What’s the difference between a TI-89 and a TI-84?
The main difference is that the TI-89 has a CAS, making it prohibited. The TI-84 does not have a CAS and is therefore permitted under the current ACT calculator policy.
7. Can I use my phone’s calculator?
No. All devices with communication capabilities, including cell phones, are strictly prohibited. Using one will result in immediate dismissal.
8. Should I buy a new calculator for the test?
Not necessarily. It’s more important to be familiar with the calculator you use. If you have a permitted calculator you’ve used in class, that is your best option. Check out our article on ACT Math Test Tips for more strategies.