Can You Use a Graphing Calculator on the ACT?
An SEO-optimized guide and policy checker to ensure you are prepared for test day.
ACT Calculator Policy Checker
Enter your calculator model name below to see if it’s likely to be permitted on the ACT Math test.
What is the ACT Calculator Policy?
The official ACT calculator policy is designed to ensure fairness and test security. The general rule is that you can use a graphing calculator on the ACT, but not all models are allowed. The policy permits any four-function, scientific, or graphing calculator, as long as it isn’t on the specific prohibited list and doesn’t have certain banned features.
Calculators are only allowed during the Mathematics section of the test. For all other sections (English, Reading, and Science), calculators must be put away. A common misunderstanding is that calculators are allowed on the Science test, but they are not. It’s crucial to know that every single question on the ACT Math test can be solved without a calculator. The main purpose of using one is to save time and reduce simple calculation errors.
Permitted vs. Prohibited: The “Formula” of ACT’s Rules
The “formula” for determining if a calculator is allowed revolves around what it CAN’T do. The ACT explicitly bans calculators that have a Computer Algebra System (CAS). A CAS can solve algebraic equations symbolically, which gives an unfair advantage. For example, it can solve for ‘x’ without you performing the steps.
Prohibited Features Table
This table outlines the key features that determine if a calculator is banned. If your calculator has any of these, it is not allowed.
| Feature | Meaning | Why It’s Prohibited | Common Examples |
|---|---|---|---|
| Computer Algebra System (CAS) | The calculator can manipulate and solve algebraic expressions symbolically. | It performs the mathematical work for the student, undermining the test’s purpose. | TI-89, TI-Nspire CAS, HP Prime |
| QWERTY Keyboard | A letter-key keyboard in the standard typewriter layout. | It could be used to store notes or communicate. | Older models or PDA-like devices. |
| Wireless / Infrared Communication | Ability to communicate with other devices. | High risk of cheating. Infrared ports must be covered with tape. | Some HP models (e.g., HP 38G, 39G, 48G). |
| Needs an Electrical Outlet | Cannot be operated solely on batteries. | Logistical and safety issues in the testing room. | N/A for modern portable calculators. |
| Cell Phone / Tablet / Laptop | Any device that is not a dedicated calculator. | These devices have communication abilities and are not permitted. | iPhones, Android devices, iPads. |
Practical Examples
Let’s see how the policy applies to two common scenarios.
Example 1: Using a Permitted Calculator
- Input Model: TI-84 Plus CE
- Analysis: This model is a graphing calculator but does NOT have a built-in CAS. It does not have a QWERTY keyboard or wireless capabilities.
- Result: PERMITTED. The TI-84 Plus family is one of the most popular and widely approved choices for the ACT.
Example 2: Using a Prohibited Calculator
- Input Model: TI-Nspire CX CAS
- Analysis: The key is the “CAS” in the model name. This calculator features a Computer Algebra System. While the non-CAS version (TI-Nspire CX) is allowed, the CAS version is explicitly banned.
- Result: PROHIBITED. The ACT policy bans all calculators with CAS functionality.
How to Use This ACT Calculator Checker
This tool is designed to give you a quick and accurate assessment of your calculator’s eligibility based on the official ACT policy. Here’s how to use it effectively:
- Find Your Calculator’s Model Name: Look at the top of your calculator. The full model name is usually printed there (e.g., “TI-30XS MultiView”, “HP Prime”).
- Enter the Model Name: Type the full model name into the input field above. The more accurate the name, the better the result.
- Click “Check Eligibility”: Our script will compare your input against a database of known permitted and prohibited models and features.
- Interpret the Results:
- PERMITTED: Your calculator is very likely allowed.
- PROHIBITED: Your calculator is on the banned list, usually due to having a CAS or other forbidden feature.
- CHECK FEATURES: The model is not in our database. You must manually check it against the list of prohibited features (like CAS, QWERTY keyboard, etc.).
Key Factors That Affect ACT Calculator Legality
Understanding these six factors is key to knowing if you can use a graphing calculator on the ACT.
- Computer Algebra System (CAS): This is the most important factor. If your calculator can perform symbolic algebra (like factoring `x^2-4` into `(x-2)(x+2)`), it is banned.
- QWERTY Keyboard: Any calculator with a keyboard laid out like a computer’s is prohibited. This is to prevent storing notes.
- Communication: Devices that can communicate wirelessly (Bluetooth, Wi-Fi, infrared) are banned. You must cover any infrared ports with opaque tape.
- Power Source: The calculator must be battery-powered. Models that require an electrical outlet are not allowed.
- Programs and Apps: While you can use a calculator like the TI-84 Plus, you must remove any programs or apps that provide CAS functionality. Test proctors may inspect your calculator’s memory.
- Noise and Printing: Calculators that make noise must be muted. Those with a paper tape printer are only allowed if the tape is removed.
Frequently Asked Questions
1. Can you use a graphing calculator on the ACT for all sections?
No, calculators are only permitted on the Math section. They are not allowed on the English, Reading, or Science sections.
2. Is the TI-84 Plus allowed on the ACT?
Yes, all versions of the TI-84 Plus (including the Plus, C Silver Edition, and CE) are explicitly allowed because they do not have a CAS.
3. What happens if I bring a prohibited calculator?
The testing staff will not allow you to use it. You may have to take the math test without a calculator, or in some cases, you could be dismissed from the test.
4. Do I have to clear my calculator’s memory?
Yes, it’s required to clear any programs or documents stored on your calculator, especially those that add CAS functionality. Proctors may check your calculator.
5. Is the TI-Nspire allowed?
It depends. The standard TI-Nspire (non-CAS) is permitted. However, the TI-Nspire CAS is strictly prohibited. You must check the exact model name.
6. Can I use a calculator app on my phone or watch?
No. All cell phones, smartwatches, and any other communication devices are banned from the testing room.
7. Are all scientific calculators allowed?
Generally, yes. Standard scientific calculators (like the TI-30X or Casio fx-300 series) are almost always allowed as they do not have prohibited features.
8. What if my calculator model isn’t on any list?
If you can’t find your model on an official list, you must verify it yourself. Ensure it does not have a CAS, a QWERTY keyboard, or any wireless capabilities. When in doubt, bring a more common, approved model as a backup.