ACT Calculator Permissibility Checker
A tool for identifying calculators that you cannot use on the ACT.
Is Your Calculator Banned?
Check the features of your calculator below to see if it complies with the official ACT calculator policy.
Does it solve algebraic equations symbolically? (e.g., TI-89, TI-Nspire CAS)
Does it have a typewriter-style keyboard?
Is the calculator an app on a smart device?
Does it have Wi-Fi, Bluetooth, or an infrared port?
Does it need to be plugged into a wall to work?
Does it have speakers or make sounds that cannot be muted?
Select any prohibited features to see the result.
Prohibited Feature Analysis
A visual summary of prohibited features detected.
What Are Calculators That You Cannot Use on the ACT?
The term “calculators that you cannot use on the ACT” refers to any electronic device that violates the official ACT calculator policy. The ACT has strict rules to ensure fairness and prevent academic dishonesty. While most standard scientific and graphing calculators are permitted, a specific set of features will get a calculator banned from the testing room. This tool helps you quickly identify if your device falls into that prohibited category. Understanding these rules is crucial for a smooth test-day experience.
The “Formula” for a Prohibited Calculator
There isn’t a mathematical formula, but a logical one. A calculator is NOT PERMITTED if it has one or more of the following features. The core principle is that the device cannot possess functionality that would give a student an unfair advantage, such as solving algebra for them or accessing outside information.
| Variable | Meaning | Unit / Type | Typical Range |
|---|---|---|---|
| hasCAS | Device has a Computer Algebra System. | Boolean (True/False) | Prohibited if True |
| hasQwerty | Device has a typewriter-style keyboard. | Boolean (True/False) | Prohibited if True |
| isDevice | The calculator is an app on a phone, tablet, or laptop. | Boolean (True/False) | Prohibited if True |
| hasWireless | Device has internet, Bluetooth, or infrared capabilities. | Boolean (True/False) | Prohibited if True |
| needsPower | Device requires an external power source to operate. | Boolean (True/False) | Prohibited if True |
| makesNoise | Device makes audible sounds that cannot be disabled. | Boolean (True/False) | Prohibited if True |
Practical Examples
Example 1: The Permitted Calculator (TI-84 Plus)
A student has a Texas Instruments TI-84 Plus. Let’s check its features:
- Inputs: hasCAS (False), hasQwerty (False), isDevice (False), hasWireless (False), needsPower (False), makesNoise (False).
- Result: PERMITTED. The TI-84 Plus is a standard graphing calculator and is one of the most common and accepted models for the ACT. For more info, see these SAT Calculator Rules, which are similar.
Example 2: The Banned Calculator (TI-89 Titanium)
Another student has a Texas Instruments TI-89 Titanium. Let’s analyze it:
- Inputs: hasCAS (True), hasQwerty (False), isDevice (False), hasWireless (False), needsPower (False), makesNoise (False).
- Result: NOT PERMITTED. The TI-89 is explicitly banned because its powerful Computer Algebra System (CAS) can perform symbolic algebraic manipulations, which is against ACT rules. This is a classic example of calculators that you cannot use on the ACT.
How to Use This Calculator Policy Checker
Using this tool is a straightforward process to avoid bringing one of the calculators that you cannot use on the ACT.
- Examine Your Calculator: Look at your physical calculator. If you don’t know its features, a quick search for its model number online will provide details.
- Check the Boxes: For each feature listed in the calculator tool above, check the box if your calculator has it.
- Review the Result: The tool will instantly update. A green “PERMITTED” status means you are likely safe. A red “NOT PERMITTED” status means your calculator violates the ACT policy and you should not bring it.
- Understand the Reasons: The details below the result will explain exactly which rule(s) your calculator violates.
For more test-day strategies, check out our guide to Maximizing Your ACT Score.
Key Factors That Affect Calculator Permissibility
- Computer Algebra System (CAS): This is the most common reason for a calculator to be banned. A CAS can manipulate variables, factor polynomials, and solve for variables, which is a core skill the ACT Math test is designed to assess. For a deeper dive, learn What is a Computer Algebra System?.
- QWERTY Keyboards: Any device with a typewriter-style keyboard is prohibited to prevent students from storing notes or using unapproved programs.
- Communication Ability: Any form of wireless or wired communication (Wi-Fi, Bluetooth, Infrared) is strictly forbidden to prevent cheating.
- Device Type: The “calculator” must be a dedicated calculator. It cannot be an application on a smartphone, tablet, smartwatch, or laptop.
- External Power: The calculator must be battery-operated. Test centers do not provide outlets, and cords are a hazard.
- Noise and Printing: Any feature that could distract other test-takers, like audible beeps or paper tape printing, must be disabled or the calculator is not allowed.
Frequently Asked Questions (FAQ)
- 1. Is my graphing calculator allowed?
- Most graphing calculators (like the TI-83/TI-84 series) are allowed. The main exceptions are those with a CAS, like the TI-89 or TI-Nspire CAS. Always check your specific model against our tool.
- 2. What happens if I bring one of the calculators that you cannot use on the ACT?
- The proctor will not allow you to use it. You will have to take the math section without a calculator. In some cases, you could be dismissed from the test. It’s not worth the risk.
- 3. Do I have to clear the memory on my calculator?
- The ACT policy requires that you remove any programs with CAS functionality. Some proctors may ask you to clear your calculator’s memory as a precaution, so be prepared for that possibility.
- 4. Are four-function or scientific calculators okay?
- Yes, both four-function and scientific calculators are permitted and are often great choices for students who aren’t comfortable with a graphing calculator. Many students find them faster for basic calculations. Consider our guide to the Best Graphing Calculators for School for recommendations.
- 5. Can I use the calculator on my smartphone?
- No. All smart devices, including phones, watches, and tablets, are strictly prohibited during the entire test.
- 6. What’s the difference between the TI-Nspire and the TI-Nspire CAS?
- The standard TI-Nspire (non-CAS) is permitted. The TI-Nspire CAS is explicitly banned. The “CAS” designation is the key difference and makes it one of the calculators that you cannot use on the ACT.
- 7. My calculator makes a sound. Can I use it?
- Only if the sound can be completely turned off. If not, it is prohibited because it can disturb other students.
- 8. Where can I find the official ACT policy?
- The most current and official policy is always available on the ACT’s official website. Our tool is based on that policy but you should always double-check the source if you are unsure.
Related Tools and Internal Resources
Proper preparation is key for success. Explore our other resources to help you get ready for your college admission tests.
- SAT Calculator Rules: Understand the similarities and differences in calculator policies between the two major tests.
- College Admissions Test Prep: A comprehensive guide to preparing for all sections of college entrance exams.
- Maximizing Your ACT Score: Strategies and tips to perform your best on test day.
- Best Graphing Calculators for School: Reviews and comparisons to help you pick the right calculator for your needs.
- Understanding Test Anxiety: Learn how to manage stress and stay focused during your exam.
- What is a Computer Algebra System?: A detailed explanation of the technology that makes many calculators prohibited.