ACT® Calculator Eligibility Checker
An essential tool to determine if you can use a graphing calculator on the ACT. Avoid test-day surprises by checking your model against the official policy.
Check Your Calculator Model
What is the ACT Calculator Policy?
The ACT calculator policy outlines the rules for which calculators are permitted for use on the math portion of the ACT test. The purpose of this policy is to ensure fairness and test security. While students are encouraged to bring a calculator they are familiar with, it’s critical to understand that not all devices are allowed. Knowing whether you can use a graphing calculator on the ACT is a crucial part of test preparation. The rules specifically prohibit calculators with certain functionalities, like a Computer Algebra System (CAS), or physical attributes, such as a QWERTY keyboard.
This policy applies only to the Mathematics test; no calculators are allowed on the Reading, English, or Science sections. All problems on the math test are designed to be solvable without a calculator, but using an approved one efficiently can save time and improve accuracy. Failing to adhere to the policy can result in dismissal from the test center, making it essential for every student to verify their device beforehand.
ACT Calculator Rules and Logic Explained
The ACT’s decision process isn’t a mathematical formula but a set of logical rules. The question, “can you use a graphing calculator on the ACT?” is answered by checking your device against a hierarchy of prohibitions. The most significant restriction is the ban on Computer Algebra Systems (CAS).
Here’s a step-by-step breakdown of the logic:
- Check for Prohibited Models: The ACT explicitly bans specific models. If your calculator is on this list (e.g., TI-89, TI-92, HP Prime), it is not allowed.
- Check for CAS Functionality: A calculator with a CAS can perform symbolic algebraic manipulation (like solving for ‘x’ or factoring polynomials), which the ACT prohibits. Models with “CAS” in their name (e.g., TI-Nspire CX CAS) are banned.
- Check for Prohibited Features: This includes devices with QWERTY keyboards, those needing an electrical outlet, cell phone or laptop calculators, and devices with wireless communication capabilities.
- Check for Required Modifications: Some calculators are allowed only if modified. This includes devices with paper tape (tape must be removed), those that make noise (sound must be off), or those with an infrared port (port must be covered with opaque tape).
| Factor | Meaning | Status if Present | Example |
|---|---|---|---|
| CAS | Computer Algebra System | Prohibited | TI-89, TI-Nspire CAS |
| QWERTY Keyboard | A typewriter-style keyboard layout. | Prohibited | Older models with text input |
| Wireless/Infrared | Ability to communicate with other devices. | Prohibited (or port must be covered) | HP 38G series |
| Power Cord | Requires external power to operate. | Prohibited | N/A (no handhelds) |
| Non-CAS Graphing | Standard graphing capability without symbolic algebra. | Permitted | TI-84 Plus, TI-Nspire CX (non-CAS) |
Permitted vs. Prohibited Calculator Features
Practical Examples: Which Calculators Are Allowed?
Let’s look at real-world examples to clarify whether you can use a graphing calculator on the ACT.
Example 1: The Student with a TI-84 Plus CE
- Calculator Model: Texas Instruments TI-84 Plus CE
- Analysis: This model does not have a Computer Algebra System (CAS). It does not have a QWERTY keyboard. It is not on the official prohibited list. It is a standard graphing calculator widely used in high schools.
- Conclusion: Allowed. The TI-84 Plus CE is one of the most common and fully permitted calculators for the ACT.
Example 2: The Student with a TI-Nspire CX II-T CAS
- Calculator Model: Texas Instruments TI-Nspire CX II-T CAS
- Analysis: The key part of the model name is “CAS.” This indicates it has a Computer Algebra System, which is explicitly banned by the ACT because it can perform symbolic algebra that the test is designed to assess.
- Conclusion: Prohibited. Even though its non-CAS counterpart (the TI-Nspire CX II-T) is allowed, the presence of CAS makes this specific model forbidden.
How to Use This ACT Calculator Checker
This tool is designed to quickly answer the question: can you use a graphing calculator on the ACT? Follow these simple steps:
- Locate Your Calculator’s Model Name: Find the exact model name and number printed on the face or back of your calculator.
- Enter the Model Name: Type the model name into the input field at the top of this page. Be as specific as possible (e.g., “TI-84 Plus” instead of just “TI”).
- Review the Results: The tool will instantly provide one of three results:
- Allowed: Your calculator is permitted for use on the ACT.
- Prohibited: Your calculator is on the banned list and cannot be used.
- Conditional: Your calculator is allowed, but only if you make specific modifications (like covering an infrared port). The explanation will detail what you need to do.
- Check the Details: The “Key Decision Factors” section shows you *why* your calculator received its status, highlighting features like CAS or a QWERTY keyboard.
Key Factors That Affect if You Can Use a Graphing Calculator on the ACT
Several factors determine a calculator’s eligibility for the ACT. Understanding these is key to making sure you bring the right tool on test day.
- Computer Algebra System (CAS): This is the most significant factor. If a calculator can solve algebraic equations symbolically (e.g., solve ‘x^2 + 2x = 8’ for ‘x’), it is banned.
- QWERTY Keypads: Any calculator with a typewriter-style (QWERTY) keyboard is prohibited.
- Communication Ability: Devices that can communicate wirelessly (e.g., via Wi-Fi, Bluetooth, or infrared) are not allowed. Some older models with infrared ports are permitted only if the port is completely covered with opaque tape.
- External Power Requirement: Your calculator must be battery-powered. Devices that need to be plugged into an electrical outlet are forbidden.
- Phone, Tablet, or Laptop: Using the calculator function on a phone, tablet, or laptop is strictly prohibited. You must have a separate, dedicated handheld calculator.
- Programs and Documents: While you can have programs on your calculator, any programs that add CAS functionality must be removed. Similarly, all stored documents or notes must be deleted. Test proctors may inspect your device.
Frequently Asked Questions (FAQ)
Yes, most graphing calculators are allowed on the ACT, as long as they do not have prohibited features like a Computer Algebra System (CAS) or a QWERTY keyboard. Models like the TI-84 Plus series are perfectly acceptable. For more details, check our SAT Score Calculator.
It depends. The standard TI-Nspire CX and TI-Nspire CX II models are allowed. However, the TI-Nspire CX CAS and TI-Nspire CX II CAS models are strictly prohibited because of their CAS functionality.
If a proctor identifies your calculator as a prohibited model, you will not be allowed to use it. In some cases, you may be dismissed from the testing center and your score may be voided. It is your responsibility to know if you can use a graphing calculator on the ACT.
The official ACT policy states you must remove any programs that give the calculator CAS functionality and remove all stored documents. While proctors may not always check, it is a rule, and you should be prepared to clear your calculator’s memory if requested. For more help, see our GPA Calculator.
Yes, a scientific calculator is sufficient. All problems on the ACT can be solved without a calculator, but a good scientific calculator can perform all the necessary functions like trigonometry and logarithms. A graphing calculator offers the additional benefit of visualizing functions, which can be helpful. For more resources, try our College Cost Calculator.
Usually, yes, but not always. The SAT and ACT have slightly different rules. For example, some CAS calculators are permitted on the SAT but banned on the ACT. Always check the specific policy for each test before test day.
The easiest way is to check the name; it often includes “CAS” (e.g., TI-Nspire CX CAS). If not, try to use its “solve” function on an algebraic equation like “x+y=10”. If it can solve for one variable in terms of the other (e.g., “x=10-y”), it has CAS. If it only returns a numerical answer or an error, it likely does not. This is a key factor when asking, can you use a graphing calculator on the ACT.
Yes, it’s highly recommended. In case your primary calculator’s batteries die or it malfunctions, having a backup (that is also an approved model) can save you from a lot of stress. You can’t share calculators with another tester. Explore more tools like our Final Grade Calculator.