ACT Calculator Policy Checker

A quick tool to check if your calculator model is likely permitted on the ACT exam.

Can You Use a Calculator for the ACT?

How this result was determined:

What is the ACT Calculator Policy?

The ACT has a specific policy regarding which calculators are permitted during the mathematics portion of the exam. The main goal of the policy is to ensure fairness and prevent any student from having an unfair advantage. While you can solve all math problems without a calculator, using a familiar and permitted one can significantly help with speed and accuracy. Calculators may only be used on the mathematics test.

Generally, the rule is that any four-function, scientific, or graphing calculator is allowed, as long as it is not on the official prohibited list and doesn’t have any forbidden features. It’s crucial to check if your specific model is acceptable before test day to avoid any issues.

ACT Calculator Formula and Explanation

There isn’t a mathematical “formula” for the policy, but rather a set of rules and criteria. The eligibility of a calculator is determined by checking it against a list of prohibited features and models.

Prohibited Features Checklist:

• Computer Algebra System (CAS): Calculators with CAS functionality are strictly forbidden. CAS can perform symbolic manipulation (like solving for x in an equation), which is not allowed.
• QWERTY Keypad: Any device with a typewriter-style keyboard (QWERTY format) is not permitted.
• External Communication: Calculators that can communicate with other devices wirelessly (e.g., via infrared or Bluetooth) are banned.
• Power Cords: A calculator must be battery-powered. You cannot use one that needs to be plugged into an outlet.
• Noise: Calculators that make noise must have the sound feature turned off.
• External Devices: You cannot use a calculator on a phone, tablet, or laptop.

Summary of Prohibited vs. Permitted Features

Feature	Status	Reasoning & Notes
Graphing Capability	Permitted	Standard graphing calculators like the TI-84 series are allowed.
Scientific Functions	Permitted	All scientific calculators are generally allowed.
Computer Algebra System (CAS)	Prohibited	Models with “CAS” in their name (e.g., TI-Nspire CAS, HP Prime) are banned.
QWERTY Keyboard	Prohibited	Prevents devices that are mini-computers.
Programs/Apps	Modification Required	You must remove any programs that have CAS functionality. Stored programs for math formulas are generally okay but check with your proctor.
Paper Tape	Modification Required	The paper tape must be removed before the test.

Practical Examples

Example 1: The Standard Graphing Calculator

• Input: A student wants to use a TI-84 Plus CE.
• Analysis: This model is a standard graphing calculator. It does not have a CAS, a QWERTY keyboard, or any other prohibited features. It is one of the most commonly recommended and used calculators for the ACT.
• Result: Permitted.

Example 2: The Prohibited CAS Calculator

• Input: A student has a TI-89 Titanium.
• Analysis: All models that begin with “TI-89” are explicitly prohibited by the ACT. This is because the TI-89 has a powerful built-in Computer Algebra System (CAS).
• Result: Prohibited.

How to Use This ACT Calculator Policy Checker

1. Find Your Model: Locate the model number on the front or back of your physical calculator.
2. Enter the Model: Type the full model name into the input field above (e.g., “TI-Nspire CX II”).
3. Check Eligibility: Click the “Check Eligibility” button.
4. Review the Result: The tool will provide one of three outcomes: Permitted, Prohibited, or Check Manually/Requires Modification.
5. Understand the Reasoning: The explanation box will detail which rules your calculator passed or failed, helping you understand the official ACT policy better. For more details on your specific model, visiting a resource like the official ACT Calculator Policy page is always a good idea.

Key Factors That Affect Calculator Eligibility

• Model Series: Certain entire series are banned, like the TI-89, TI-92, and HP 50G. Knowing your series is critical.
• “CAS” in the Name: If your calculator’s model name includes “CAS,” it is almost certainly prohibited.
• Keyboard Layout: A simple visual check for a QWERTY keyboard can immediately disqualify a device.
• Programs: While programs are allowed, those with CAS functionality are not. Proctors may ask to check or clear your calculator’s memory.
• Physical Condition: Make sure your calculator works, has fresh batteries, and does not have features that require modification (like paper tape or sound) active on test day.
• Official List: The ACT maintains an official, though not exhaustive, list of prohibited calculators. Always refer to the latest ACT Calculator Policy for definitive guidance.

Frequently Asked Questions (FAQ)

Can I use a TI-Nspire on the ACT?

It depends. The standard TI-Nspire CX and TI-Nspire CX II are permitted. However, the TI-Nspire CAS is explicitly prohibited.

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’s best to bring a backup that you know is permitted.

Do I have to clear the memory on my calculator?

You must remove any programs that have CAS functionality. While proctors don’t always check, they have the right to, and you could be dismissed if such programs are found.

Is a TI-84 Plus allowed?

Yes, all calculators in the TI-83 and TI-84 families are permitted, including the Plus, CE, and Python editions.

Can I share my calculator with someone else?

No, sharing calculators during the test is not permitted under any circumstances.

Can I use my calculator on the Science section?

No, calculators are only allowed during the Math section of the ACT.

Are all scientific calculators allowed on the ACT?

Yes, virtually all standard scientific calculators are permitted, as they do not have the advanced prohibited features like CAS or graphing. For example, a TI-30 is a safe and effective choice.

What if my calculator runs out of batteries?

You are responsible for ensuring your calculator works. It is highly recommended to install fresh batteries before the test and/or bring a permitted backup calculator and extra batteries.

Related Tools and Internal Resources

For more help on your college admission journey, check out these resources:

• GPA Calculator: Calculate your grade point average to see where you stand.
• College Acceptance Calculator: Estimate your chances of getting into your dream school.
• ACT Score Calculator: Understand how your raw score converts to the scaled score.
• What Calculators Are Allowed on the ACT?: A guide to understanding the rules.
• The Official ACT Calculator Rules: Another helpful resource on the policy.
• Official ACT Calculator Policy: The definitive source from the test makers themselves.