ACT Calculator Policy Checker
Wondering can you use a graphing calculator on the ACT? You’re in the right place. The ACT has strict rules, and bringing a prohibited calculator can lead to dismissal from the test. Use our simple policy checker to see if your model is permitted. Enter your calculator model and check for any prohibited features to get an instant result.
Is Your Calculator ACT-Approved?
Policy Visualized
Compliance Score
This chart dynamically shows your calculator’s compliance level based on your inputs.
Examples of Permitted vs. Prohibited Calculators
| Status | Common Models | Reasoning |
|---|---|---|
| ✅ Permitted | TI-84 Plus (all versions), TI-83 Plus, TI-Nspire CX (non-CAS) | These are standard graphing calculators without prohibited features like CAS. |
| ❌ Prohibited | TI-89, TI-92, TI-Nspire CX CAS, HP Prime | These models all contain a Computer Algebra System (CAS). |
| ❌ Prohibited | Any calculator on a phone, tablet, or laptop | General-purpose computing devices are not allowed. |
| ⚠️ Modification Needed | HP 38G Series, HP 39G Series, HP 48G | These have infrared ports that must be covered with opaque tape. |
A quick reference guide for some of the most common calculators students ask about.
What is the ACT Calculator Policy?
The ACT calculator policy outlines the rules for which calculators are, and are not, allowed during the mathematics portion of the ACT test. The core principle is to ensure fairness and prevent any student from having an unfair advantage. While a calculator is not required to solve any problem on the ACT, it can be a critical tool for time management. Understanding whether you can use a graphing calculator on the ACT is the first step. Generally, any 4-function, scientific, or graphing calculator is permitted as long as it isn’t on the official prohibited list and doesn’t have specific forbidden features.
This policy is for students taking the ACT who want to use a personal calculator. The main misconception is that all graphing calculators are fine, but models with a Computer Algebra System (CAS) are strictly forbidden. It is your responsibility to know the rules before test day.
ACT’s Logic for Permitted Calculators Explained
There isn’t a mathematical formula for the policy, but a logical one based on a hierarchy of checks. The ACT’s goal is to ban devices that can perform symbolic algebraic manipulation, communicate wirelessly, or resemble a computer. The question “can you use a graphing calculator on the ACT?” depends entirely on its specific features.
The evaluation process works like this:
- Check Prohibited Model List: Is the model explicitly banned by name (e.g., TI-89, HP Prime)?
- Check for Prohibited Features: Does it have a CAS, a QWERTY keyboard, wireless capability, or require an external power source?
- Check for Required Modifications: Does it have features that are allowed but need to be modified, like an infrared port that needs covering?
The “variables” in this decision are the features of the calculator itself.
| Feature | Meaning | Why It’s Prohibited | Typical Location |
|---|---|---|---|
| Computer Algebra System (CAS) | Software that can solve equations symbolically (e.g., solve for ‘x’). | It solves algebraic problems for the student, which is against test rules. | Often indicated by “CAS” in the model name (e.g., TI-Nspire CAS). |
| QWERTY Keyboard | A typewriter-style lettered keyboard. | These devices are considered computers, not calculators. | Physical hardware on the calculator body. |
| Wireless/Infrared | Ability to communicate with other devices. | Prevents any possibility of cheating or external communication. | Infrared ports are small, dark red plastic rectangles. |
| External Power | Requires a plug to operate. | Poses a logistical and safety issue in testing centers. | A power cord jack on the device. |
Practical Examples (Real-World Use Cases)
Example 1: Student with a TI-84 Plus CE
- Input: Calculator model is “TI-84 Plus CE”. The student checks no prohibited feature boxes.
- Analysis: The TI-84 Plus CE is not on the prohibited list and does not have a built-in CAS or QWERTY keyboard. It is a standard, widely accepted graphing calculator.
- Output: The calculator is ALLOWED. This is one of the most common and safest choices for the test.
Example 2: Student with a TI-Nspire CX CAS
- Input: Calculator model is “TI-Nspire CX CAS”. The student checks the “Has a Computer Algebra System (CAS)” box.
- Analysis: The “CAS” in the name explicitly marks it as having a Computer Algebra System. This is on the ACT’s prohibited list.
- Output: The calculator is PROHIBITED. The student must bring a different, non-CAS calculator.
How to Use This ACT Calculator Policy Checker
Using this tool to determine if you can use a graphing calculator on the ACT is simple and takes seconds.
- Enter Your Calculator Model: Type the model name exactly as it appears on your device into the input field. For example, “TI-84 Plus Silver Edition”.
- Check for Prohibited Features: Read the descriptions for the checkboxes. If you know your calculator has a CAS or a QWERTY keyboard, check the corresponding box.
- Review Your Results: The tool will immediately provide a primary result: ALLOWED, PROHIBITED, or CHECK MANUALLY. It will also explain the reason based on model lists and feature checks.
- Reset if Needed: Click the “Reset” button to clear the inputs and start over with a different calculator model.
If you receive a “CHECK MANUALLY” result, it means your calculator isn’t on the common lists, so you’ll need to carefully review the official ACT policy page, linked in the FAQ, or consult your school counselor.
Key Factors That Affect Calculator Permissibility
Several factors determine whether your calculator is allowed. Being aware of these is crucial for a smooth test day experience.
- Computer Algebra System (CAS): This is the most significant factor. If your calculator has CAS, it’s banned. Period. This is because it undermines the math test’s purpose by solving algebraic problems for you.
- QWERTY Keyboards: Any calculator with a keyboard like a computer is prohibited. This blurs the line between a calculator and a small computer, which is not allowed.
- Explicitly Prohibited Models: The ACT maintains a specific list of banned calculators, including the entire TI-89 and TI-92 series, and the HP Prime. Knowing the prohibited ACT calculators is as important as knowing the allowed ones.
- Required Modifications: Some older calculators (like the HP 48G) have infrared ports for data transfer. These are allowed only if the port is completely covered by opaque tape, like electrical tape.
- Programs and Applications: While the ACT has relaxed its policy on clearing calculator memory, any programs that provide CAS functionality are forbidden. Proctors can inspect your calculator’s apps. Reviewing the ACT math section rules is a good idea.
- Power Source: The calculator must be battery-powered. Devices that need to be plugged into an electrical outlet are not permitted in the testing room.
Frequently Asked Questions (FAQ)
Can I use a TI-84 Plus on the ACT?
Yes, all versions of the Texas Instruments TI-84 Plus, including the Plus CE and Plus Silver Edition, are explicitly allowed on the ACT. It is one of the most recommended calculators. For more details, see our guide on the TI-84 on ACT.
What if my calculator isn’t on any list?
If your calculator is not on the official prohibited list and does not have any prohibited features (like CAS or a QWERTY keyboard), it is likely permitted. Our tool will give a “Check Manually” result in this case. When in doubt, have a backup option from the approved list, like a TI-84.
Is the TI-Nspire allowed on the ACT?
This is a common point of confusion. The standard TI-Nspire and TI-Nspire CX are ALLOWED. However, the TI-Nspire CAS and TI-Nspire CX CAS are PROHIBITED. The “CAS” is the key differentiator.
Do I have to clear my calculator’s memory?
The current policy does not require you to clear all memory, but it does forbid programs that have CAS functionality. Proctors have the right to inspect your calculator. To be safe, it’s best to remove any non-essential programs before test day.
What happens if I bring a prohibited calculator?
If a proctor determines your calculator is prohibited, you will not be allowed to use it. In the worst-case scenario, you could be dismissed from the test, and your scores voided. This is why checking the calculator policy for ACT beforehand is critical.
Can I use my phone’s calculator?
No. Cell phones, smartwatches, tablets, laptops, and any other communication devices are strictly forbidden from being on your person during the test, let alone being used as a calculator.
Is the calculator policy the same as the SAT?
No, the policies are similar but not identical. You should always check the specific policy for the test you are taking. For a comparison, you can read our SAT calculator policy guide.
Where can I find the official ACT policy?
You can always find the most up-to-date, official policy on the ACT’s website. It is the ultimate authority on whether you can use a graphing calculator on the ACT.