ACT Calculator Policy Checker
Can you use a CAS calculator on the ACT? Enter your calculator’s model to check its status against the official ACT policy.
Is Your Calculator Allowed?
Type the full model name as written on your calculator.
What is the ACT’s Policy on CAS Calculators?
The question, “can you use a CAS calculator on the ACT?” is one of the most common sources of confusion for students preparing for the test. The short answer is **no**. The ACT explicitly prohibits calculators that have a built-in or downloaded Computer Algebra System (CAS). A CAS can perform symbolic manipulation (like solving algebraic equations for variables), which the ACT considers an unfair advantage since these are skills the test is designed to measure.
This policy ensures fairness and maintains the integrity of the math test. All problems on the ACT math section can be solved without a calculator, so the tool is meant to aid in arithmetic, not solve problems outright.
Prohibited vs. Permitted Calculators
The ACT maintains a specific list of prohibited calculator models. The easiest way to know if your device is allowed is to check it against this list. Our checker tool above automates this process for you.
Official ACT Prohibited Calculator List
The following table summarizes calculator models that are explicitly banned by the ACT. If your calculator model starts with any of these series numbers, it is not allowed.
| Brand | Prohibited Models & Series |
|---|---|
| Texas Instruments | TI-89, TI-92, TI-Nspire CAS |
| Hewlett-Packard | HP Prime, HP 48GII, HP 40G, HP 49G, HP 50G |
| Casio | fx-CP400 (ClassPad 400), ClassPad 300, ClassPad 330, Algebra fx 2.0, CFX-9970G series |
Prohibited Features
Besides specific models, the ACT bans any calculator with certain features. This includes:
- Devices with QWERTY-style keyboards.
- Calculators built into cell phones, tablets, or laptops.
- Any device that needs an electrical outlet for power.
- Devices with wireless or Bluetooth capability.
Practical Examples
Example 1: A Prohibited Calculator
- Input: Student enters “TI-Nspire CX II CAS”.
- Logic: The checker finds the term “TI-Nspire CAS” in the input.
- Result: PROHIBITED. The tool explains that all calculators with “CAS” in their name are banned.
Example 2: A Permitted Calculator
- Input: Student enters “TI-84 Plus”.
- Logic: The checker does not find this model in the prohibited list.
- Result: LIKELY PERMITTED. The tool confirms this model is not on the prohibited list but advises checking the official ACT website for the most current rules.
How to Use This ACT Calculator Policy Checker
- Find Your Calculator Model: Look at the face of your calculator to find its exact model name and number.
- Enter the Model: Type the full model name into the input field above.
- Check the Result: The tool will instantly show you one of three results:
- PROHIBITED: Your calculator is on the ACT’s banned list.
- LIKELY PERMITTED: Your calculator is not on the banned list, and is probably safe to use.
- CHECK MODEL: The result is unclear; you should double-check your model and the official ACT policy.
- Read the Details: The explanation below the main result provides important context about why your calculator’s status is what it is.
Key Factors That Affect Calculator Legality
- CAS Functionality: The number one disqualifier. If it has a Computer Algebra System, it’s out.
- QWERTY Keyboard: A full letter keyboard is a red flag and is not allowed.
- Wireless Communication: No calculators that can connect to the internet or other devices are permitted.
- Power Source: Calculators must be battery-operated. Cords and power adapters are not allowed.
- Noise: Any calculator that makes noise must be muted for the test.
- Infrared Ports: Models with an IR data port must have it completely covered with opaque tape.
Frequently Asked Questions (FAQ)
Why can’t you use a CAS calculator on the ACT?
CAS calculators can solve algebraic equations, factor, and perform other symbolic manipulations that the ACT is designed to test. Allowing them would provide an unfair advantage.
Is the TI-Nspire allowed on the ACT?
It depends. The TI-Nspire (non-CAS) model is permitted. However, the TI-Nspire CAS model is strictly prohibited. Always check for “CAS” in the model name.
What if my calculator is not on the prohibited list?
If your calculator is not on the prohibited list and doesn’t have any forbidden features (like a QWERTY keyboard), it is generally allowed. However, it’s always best to consult the official ACT website as policies can change.
Can I use my phone’s calculator app?
No. All phones, smartwatches, tablets, and laptops are banned from the testing room. Using one can lead to dismissal.
What is the difference between a scientific and a graphing calculator?
A scientific calculator handles trigonometric functions, logarithms, and exponents. A graphing calculator does all that plus it can plot equations on a coordinate plane. Most models of both types are allowed, as long as they are not on the prohibited list.
Does the SAT have the same calculator rules?
No, the SAT and ACT have different calculator policies. The SAT is generally more permissive and even allows CAS calculators on one of its math sections. Always check the specific policy for the test you are taking.
Do I need a graphing calculator for the ACT?
No. While graphing calculators can be helpful, every single math problem on the ACT is solvable without one. Many students do just as well with a familiar scientific calculator.
What should I do on test day?
Bring a permitted calculator that you are familiar with. It is highly recommended to also bring a backup calculator with fresh batteries just in case. You are not allowed to share calculators during the test.
Related Tools and Internal Resources
Check out our other resources for test preparation and college planning:
- SAT Calculator Policy: See how the rules differ for the SAT.
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- ACT Score Chart: Understand how your raw score converts to the scaled score.
- Scholarship Finder: Search for scholarships based on your scores and interests.
- Final Grade Calculator: Figure out what you need on your final exam.