Can You Use A Graphing Calculator On The Act

An easy-to-use policy checker and complete guide.

ACT Calculator Eligibility Checker

Understanding the ACT’s Stance on Graphing Calculators

The question, “can you use a graphing calculator on the ACT,” is one of the most common concerns for students preparing for the exam. The short answer is yes, you can use a graphing calculator, but with very important restrictions. The ACT’s policy is designed to ensure fairness and prevent any student from having an unfair advantage through advanced calculator functionalities. While all math problems on the ACT are solvable without a calculator, an approved device can significantly improve your speed and accuracy.

The “Eligibility Formula”: What Makes a Calculator Prohibited?

The core of the ACT calculator policy revolves around prohibiting devices with features that can solve complex algebraic equations for the user. This is primarily aimed at calculators with a built-in Computer Algebra System (CAS). Think of the policy not as a math formula, but as a set of logical rules.

Your calculator is likely prohibited if it has any of the following features:

• Computer Algebra System (CAS): This is the biggest rule. CAS can perform symbolic manipulation (like solving for ‘x’ in an equation), which the ACT wants you to do by hand.
• QWERTY Keyboard: Calculators with a typewriter-style keyboard are not allowed.
• Wireless or Internet Connectivity: Any device that can communicate wirelessly (e.g., Bluetooth, Wi-Fi) is banned.
• Power Cords: Calculators that need to be plugged into a wall are not permitted.
• Cell Phone or Computer Functionality: Using a calculator on your phone, tablet, or laptop is strictly forbidden.

Prohibited Calculator Features for the ACT

Feature	Meaning	Why It’s Prohibited	Common Examples
Computer Algebra System (CAS)	Can simplify expressions, solve equations symbolically, and perform calculus.	It performs algebraic steps that the test is designed to measure.	TI-89, TI-92, TI-Nspire CAS
QWERTY Keyboard	A full alphabet keyboard like a computer.	Can be used to store notes or for communication.	N/A (no modern calculators have this)
Wireless Communication	Bluetooth, Wi-Fi, or infrared ports that can send/receive data.	Risk of cheating and communication with other devices.	Some older HP models
External Power	Needs to be plugged into an electrical outlet to function.	Logistical and safety hazard in a testing environment.	N/A

Practical Examples

Example 1: A Permitted Calculator

• Input: TI-84 Plus
• Logic: The model does not contain “CAS” and is not on the explicit prohibited list. It’s a widely known and accepted graphing calculator.
• Result: PERMITTED. This calculator is a standard tool for high school math and is fully compliant with ACT rules.

Example 2: A Prohibited Calculator

• Input: TI-Nspire CX CAS
• Logic: The model name explicitly includes “CAS,” which stands for Computer Algebra System. The calculator can perform symbolic algebra, which is forbidden.
• Result: PROHIBITED. The ACT bans all calculators with CAS functionality.

How to Use This ‘Can You Use a Graphing Calculator on the ACT’ Calculator

Using this tool is straightforward. Follow these steps to determine if your calculator is ready for test day.

1. Find Your Calculator Model: Look at the front of your calculator. The model name is usually printed clearly at the top (e.g., “TI-84 Plus CE”, “Casio fx-9750GII”).
2. Enter the Model Name: Type the full model name into the input field above.
3. Check Eligibility: Click the “Check Eligibility” button.
4. Review the Result: The tool will instantly tell you if your calculator is ‘Permitted’, ‘Prohibited’, or if you need to ‘Check Manually’. It will also provide a brief explanation for the result.

Key Factors That Affect Calculator Eligibility

When wondering, “can you use a graphing calculator on the ACT,” several key factors come into play. Understanding them will help you choose the right tool for test day.

• Model Name Suffixes: The letters after the model number are critical. For example, the TI-Nspire CX is allowed, but the TI-Nspire CX CAS is not.
• Official ACT Prohibited List: The ACT publishes a list of specific models that are banned. Our calculator’s logic is based on this list.
• Modifications: Some calculators are allowed only if modified. For example, devices with infrared ports must have the port covered with opaque tape.
• Programs and Apps: Even an allowed calculator can become prohibited if you load programs that provide CAS functionality. You are responsible for removing such programs before the test.
• Test Center Staff Discretion: Ultimately, the test proctor has the final say. If your calculator looks suspicious or makes noise, they can forbid its use.
• Policy Updates: The ACT can update its calculator policy at any time. It’s wise to check the official ACT website close to your test date for the latest rules.

Frequently Asked Questions (FAQ)

1. Is the TI-84 Plus allowed on the ACT?

Yes, all versions of the TI-84 Plus (including the CE model) are permitted for use on the ACT. It is one of the most commonly used calculators for the test.

2. Why is the TI-89 prohibited?

The TI-89 is prohibited because it has a built-in Computer Algebra System (CAS), which can perform algebraic manipulations that are supposed to be tested.

3. What does CAS mean and why is it banned?

CAS stands for Computer Algebra System. It allows a calculator to solve equations, factor polynomials, and perform calculus symbolically. The ACT bans CAS to ensure the test is measuring your math skills, not your calculator’s power.

4. Can I use the calculator on my phone?

No. All cell phones, smartphones, and any other communication devices are strictly prohibited from being used during the test.

5. What happens if I bring a prohibited calculator?

If you are found with a prohibited calculator, the test administrator will confiscate it, and you may be dismissed from the test center and have your score voided.

6. Does the ACT provide a calculator?

No, you are responsible for bringing your own approved calculator. Testing centers do not provide them.

7. Can I share my calculator with another student?

No, sharing calculators during the test is not permitted.

8. What if my calculator is not on the permitted or prohibited list?

If your calculator model is not explicitly listed, it is most likely permitted as long as it does not have any of the prohibited features (like CAS or a QWERTY keyboard). Our checker will advise you to check manually, but generally, the absence of prohibited features means it is allowed.