ACT Calculator Eligibility Checker

Determine if you can use your CAS (or other) calculator on the ACT exam.

Check Your Calculator’s Status

What is the ACT Calculator Policy?

The ACT has a strict policy regarding which calculators are permitted during the math portion of the test. The core rule is designed to ensure fairness and prevent any student from having an unfair advantage. While you can solve every problem without a calculator, using a familiar and permitted one can significantly help with speed and accuracy. The main question for many students is: can you use CAS calculators on the ACT? The answer is a firm no.

A Computer Algebra System (CAS) allows a calculator to solve algebraic equations symbolically. For example, it can solve for ‘x’ in an equation or simplify complex expressions without needing numerical values. Because this functionality could solve many ACT math problems automatically, any calculator with CAS is strictly prohibited.

The ACT’s “Formula” for Calculator Eligibility

There isn’t a complex mathematical formula for the policy, but a simple logical one. The ACT explicitly prohibits any calculator with CAS functionality. This is the most important factor. The policy also bans devices with internet access, QWERTY keyboards (like a computer), or those built into phones or tablets.

This table outlines the logical “variables” determining if a calculator is allowed.

Variable	Meaning	Permitted Value	Prohibited Value
CAS Functionality	Ability to manipulate symbolic algebra.	No	Yes
QWERTY Keyboard	A full letter keyboard.	No	Yes
Communication Device	Part of a phone, tablet, or smartwatch.	No	Yes
Power Cord	Needs to be plugged in to work.	No	Yes

Practical Examples

Example 1: A Student with a TI-89 Titanium

A student tries to bring a Texas Instruments TI-89 Titanium. This calculator is powerful and features a built-in Computer Algebra System (CAS).

• Input: TI-89 Titanium
• Logic: The model is on the official prohibited list because it has CAS.
• Result: This calculator is PROHIBITED and cannot be used on the ACT.

Example 2: A Student with a TI-84 Plus CE

Another student brings a Texas Instruments TI-84 Plus CE. This is a very common graphing calculator.

• Input: TI-84 Plus CE
• Logic: This model does not have CAS and is not on the prohibited list. It is a standard graphing calculator.
• Result: This calculator is PERMITTED for use on the ACT.

How to Use This ACT Calculator Eligibility Calculator

Using this tool is straightforward. Follow these simple steps to check if you can use your calculator on the ACT.

1. Find Your Calculator’s Model: Look at the front of your calculator. The model name and number are usually printed at the top (e.g., “TI-Nspire CX”, “Casio fx-9750GII”).
2. Enter the Model: Type the model name into the input field above. You don’t need to be exact with capitalization or spacing, but try to be accurate.
3. Check Eligibility: Click the “Check Eligibility” button.
4. Review the Result: The tool will instantly tell you if your calculator is likely Permitted, Prohibited, or if the model was not found in our list. Always read the details for important context.

Key Factors That Affect Calculator Eligibility

Several factors determine whether your calculator will be allowed in the testing room. Understanding these will help you avoid any surprises on test day. Knowing whether you can use CAS calculators on the ACT is just the first step.

• Computer Algebra System (CAS): This is the most critical factor. No calculators with CAS are allowed.
• QWERTY Keyboards: Calculators with a typewriter-style keyboard (like the TI-92) are banned.
• External Communication: Devices with Wi-Fi, Bluetooth, or any form of internet access are prohibited.
• Pen-Input / Stylus: Most devices that use a stylus are not allowed, with a few specific exceptions (like the Sharp EL 9600).
• Power Requirements: Calculators that need an external power source (i.e., a power cord) are not permitted.
• Noise: If your calculator makes noise, you must turn the sound off.

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Frequently Asked Questions (FAQ)

1. What is a Computer Algebra System (CAS)?

A CAS is a sophisticated program that enables a calculator to perform symbolic math. Instead of just calculating with numbers (like 2+2=4), it can work with variables and expressions, like simplifying (x+y)^2 into x^2 + 2xy + y^2 or solving for x. This is why you can’t use CAS calculators on the ACT.

2. Is the TI-Nspire allowed on the ACT?

This is a common point of confusion. The standard TI-Nspire (non-CAS) model is permitted. However, the TI-Nspire CAS model is explicitly prohibited. You must check your specific model to be sure.

3. What happens if I bring a prohibited calculator?

Testing staff will not allow you to use it. You may be dismissed from the test, and your score could be voided. It is your responsibility to bring a permitted device.

4. Does the ACT provide calculators?

No, the testing center will not provide a calculator for you. For digital versions of the test, a built-in on-screen calculator (Desmos) may be available.

5. Can I use my phone’s calculator app?

No. All phones, smartwatches, and other communication devices are strictly banned from the testing room. Using one will result in immediate dismissal.

6. What is the best calculator for the ACT?

The best one is a permitted one that you are already familiar with. You don’t need a high-end graphing calculator. A reliable scientific calculator like the TI-30XS MultiView is often sufficient and easier to use than a graphing calculator you’re unfamiliar with.

7. My calculator is not on the prohibited list, is it safe?

Generally, yes. The ACT’s policy is to allow any four-function, scientific, or graphing calculator as long as it’s not on the prohibited list and meets the other criteria (no QWERTY keyboard, etc.). If you are unsure, it’s best to check the official ACT website.

8. Are all graphing calculators banned?

No, many graphing calculators are allowed. The ban is specifically on those with prohibited features like CAS. Models like the TI-83, TI-84 Plus, and Casio fx-9750GII are perfectly acceptable.

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