ACT® Calculator Eligibility Checker

Determine if you can use your graphing calculator on the ACT test.

Check Your Calculator Model

What is the ACT Calculator Policy?

Many students wonder, “can I use a graphing calculator on the ACT?“. The short answer is yes, but with strict rules. The ACT’s official policy is designed to ensure fairness and prevent any student from having an unfair advantage. While you are permitted to use a calculator on the Mathematics section of the test, not all calculators are allowed. The most critical rule is the prohibition of calculators with a Computer Algebra System (CAS). This guide and our eligibility checker will help you understand if your device is compliant.

ACT Calculator Eligibility Decision Flow

Prohibited vs. Allowed Calculators: The “Formula”

The “formula” for whether you can use a graphing calculator on the ACT is a set of rules, not a mathematical equation. The primary variable is the calculator’s features. Any device with functionality on the prohibited list is automatically disqualified.

Key Prohibited Features

This table outlines features that will get a calculator banned from the ACT.

Feature	Reason for Prohibition	Typical Examples
Computer Algebra System (CAS)	Can solve algebraic equations symbolically, providing an unfair advantage.	TI-89, TI-Nspire CAS, HP Prime
QWERTY Keyboard	Resembles a computer, can be used for notes.	Older models with full letter keyboards.
Wireless/Bluetooth/Internet	Poses a security risk for communication.	No standard calculators, but applies to phones/tablets.
Stylus or Pen-Input	Considered a computer-like interface.	Casio ClassPad series (Exception: Sharp EL 9600 is permitted).

Conditionally Allowed Calculators

Some calculators are allowed only after modification. If you have one of these, you must take action before the test.

• Calculators with Programs: You must remove any programs that have CAS functionality.
• Calculators with Paper Tape: The tape must be removed.
• Calculators that Make Noise: The sound feature must be turned off.
• Calculators with Infrared Ports: The port must be completely covered with opaque tape (e.g., duct tape). Models like the HP 38G, 39G, and 48G series fall into this category.

Practical Examples

Let’s see how the rules apply to common scenarios.

1. Example 1: The Prohibited High-End Calculator
   • Input Model: “TI-89 Titanium”
   • Analysis: The TI-89 series is explicitly banned by the ACT because it contains a Computer Algebra System (CAS).
   • Result: PROHIBITED
2. Example 2: The Standard Approved Calculator
   • Input Model: “TI-84 Plus CE”
   • Analysis: The TI-84 Plus family does not have a CAS and is one of the most widely approved and used calculators for the ACT.
   • Result: ALLOWED

How to Use This “Can I Use My Graphing Calculator on the ACT” Calculator

Using this tool is straightforward:

1. Find Your Model Number: Locate the model name/number on the face or back of your calculator.
2. Enter the Model: Type the model into the input field above. Be as specific as you can.
3. Check Eligibility: Click the “Check Eligibility” button.
4. Review the Result: The tool will tell you if your calculator is Allowed, Prohibited, or Conditionally Allowed, along with a reason.

Key Factors That Affect ACT Calculator Eligibility

• Computer Algebra System (CAS): This is the most common reason for a calculator being banned. These systems can perform symbolic manipulation (e.g., factoring `x^2-4` into `(x-2)(x+2)`), which is not allowed.
• Official Policy Updates: The ACT occasionally updates its list. Always check the official ACT website for the most current policy before your test date.
• Proctor Discretion: Test proctors have the final say. If your calculator looks like it has been tampered with or has prohibited features, they can forbid its use.
• Programs and Memory: While many calculators can store programs, you may be asked to clear the memory. You must remove any programs that replicate CAS functionality.
• Physical Hardware: Devices with QWERTY keyboards or those that need an external power source are not allowed.
• Communication Capabilities: Any calculator with infrared, Bluetooth, or Wi-Fi is strictly forbidden.

Frequently Asked Questions (FAQ)

Can I use a TI-89 on the ACT?

No, all models that begin with TI-89 or TI-92 are explicitly prohibited because they have a built-in Computer Algebra System (CAS).

Is the TI-Nspire allowed on the ACT?

It depends. The standard TI-Nspire CX and CX II (non-CAS) models are allowed. However, the TI-Nspire CAS model is strictly prohibited. Make sure your model does not say “CAS” on it.

What if my calculator isn’t on the prohibited or allowed list?

If your calculator is not explicitly listed, it must not have any of the prohibited features (like CAS or a QWERTY keyboard). When in doubt, have a backup calculator that is on the approved list, like a TI-84 Plus.

Do I need to clear my calculator’s memory before the test?

The ACT requires you to remove any programs that have CAS functionality. Proctors may inspect your calculator, and some may ask you to clear the memory as a precaution. It’s best to back up any important data and be prepared to clear it.

Can I use my calculator on the science section?

No. Calculators are only permitted for the Mathematics Test section. Using one on any other section is a violation of the rules.

Are all scientific calculators allowed on the ACT?

Yes, generally all scientific calculators are permitted as they do not have the advanced functionality (like graphing or CAS) that is restricted.

What happens if I bring a prohibited calculator?

You will not be allowed to use it. If you are caught using one during the test, you may be dismissed, and your test score will be voided.

Where can I find the official, most up-to-date policy?

The definitive source for the ACT calculator policy is the official ACT website (act.org). Policies can change, so you should always verify there before your test date.