ACT Calculator Policy: Is Your Calculator Allowed?
Don’t risk your score. Use our simple checker to see if your calculator is permitted on the official ACT test.
ACT Calculator Eligibility Checker
Enter the model name as written on your calculator. For example, “TI-Nspire CX II” not “Texas Instruments calculator”.
What is the ACT Calculator Policy?
The ACT has a strict calculator policy to ensure fairness and test security. You are allowed to use a calculator on the Mathematics section of the ACT, but not all calculators are permitted. The policy is designed to prevent students from using devices that could provide an unfair advantage, such as those that can store complex formulas, solve algebraic equations symbolically, or communicate wirelessly. All problems on the ACT Math test can be solved without a calculator, but using a familiar and permitted calculator can help you manage your time effectively.
Generally, you can use most four-function, scientific, and graphing calculators, as long as they are not on the prohibited list. However, some models, especially those with advanced features like a Computer Algebra System (CAS), are explicitly banned.
Prohibited vs. Permitted Calculators
The main dividing line in the act can i use a calculator debate is the presence of a Computer Algebra System (CAS). A CAS can solve equations algebraically, which is not allowed. If your calculator model includes “CAS” in its name, it’s almost certainly prohibited.
Prohibited Features and Devices
Beyond specific models, the ACT prohibits any device with the following features:
| Feature/Device Type | Reason for Prohibition |
|---|---|
| Computer Algebra System (CAS) | Can perform symbolic algebra (e.g., factor, solve for variables). |
| QWERTY-style keyboard | Resembles a computer keyboard and is not allowed. |
| Wi-Fi, Bluetooth, or Internet Access | Prevents communication and access to external information. |
| Cell Phones, Tablets, Laptops | These are not dedicated calculators and are strictly forbidden. |
| Pen-input or Stylus devices | Considered a form of computer input (exception: Sharp EL 9600). |
| Makes noise or requires power cord | Must be silent and battery-operated. |
Examples of Prohibited Models
The following table lists some of the most common calculator models that are explicitly banned by the ACT. This is not an exhaustive list. For the official list, see our FAQ on where to find ACT’s calculator policy.
| Brand | Prohibited Models |
|---|---|
| Texas Instruments (TI) | TI-89 series, TI-92 series, TI-Nspire CAS models. |
| Hewlett-Packard (HP) | HP Prime, HP 48GII, and models starting with HP 40G, HP 49G, or HP 50G. |
| Casio | fx-CP400 (ClassPad 400), ClassPad 300/330, Algebra fx 2.0. |
How to Use This ACT Calculator Checker
Using our tool is simple and provides instant clarity on the question, “act can i use a calculator?”. Follow these steps:
- Find Your Model Number: Look at the top of your calculator. You will see a model name and number, such as “TI-84 Plus” or “Casio fx-300ES Plus”.
- Enter the Model: Type the model name into the input field above. Be as specific as you can.
- Click “Check My Calculator”: The tool will instantly analyze your input against the ACT’s known rules.
- Review the Result: The result will show “Permitted,” “Prohibited,” or “Check Manually.” It will also provide a brief explanation for why a calculator is prohibited.
Practical Examples
Let’s see how the checker works with some common scenarios.
- Input: “TI-84 Plus”
Result: Permitted.
Reasoning: The TI-84 Plus is a standard graphing calculator without a CAS and is one of the most popular calculators used for the ACT. - Input: “TI-Nspire CAS”
Result: Prohibited.
Reasoning: The “CAS” in the name stands for Computer Algebra System, which is explicitly banned by the ACT. - Input: “TI-Nspire CX”
Result: Permitted.
Reasoning: The non-CAS version of the TI-Nspire is allowed. This is a critical distinction, showing why checking the full model name is so important.
Key Factors That Affect Your Calculator Choice
Choosing the right calculator is about more than just a list of approved models. Here are six key factors to consider for test day:
- Familiarity: The best calculator is the one you already know how to use. Test day is not the time to learn a new device. Practice with your chosen calculator for all your ACT prep.
- Battery Life: Ensure your calculator has fresh batteries. If it’s rechargeable, make sure it’s fully charged. Bring a backup calculator or spare batteries if you’re concerned.
- Correct Mode: Make sure your calculator is set to the correct mode (Degrees vs. Radians) as needed for trigonometry problems.
- Noiseless Operation: Your calculator must not make any noise. If it has a sound feature, you must turn it off.
- No Programs or Documents: If your calculator can store programs or documents, you must remove them before the test, especially any programs that add CAS functionality.
- Official Policy Check: Always check the official ACT website for the most current policy before your test date, as rules can change. You can find more information in our related resources section.
Frequently Asked Questions (FAQ)
1. Can I use a calculator on all sections of the ACT?
No, you can only use a calculator on the Mathematics section. Calculators are not permitted on the English, Reading, or Science sections.
2. What happens if my calculator is not on the prohibited list?
If your calculator is not on the prohibited list and doesn’t have any prohibited features (like CAS or a QWERTY keyboard), it is generally permitted. This includes most scientific and four-function calculators.
3. Can I use my phone’s calculator app?
No. Cell phones, smartwatches, tablets, and any other communication devices are strictly prohibited from being used during the test.
4. What is a Computer Algebra System (CAS)?
A CAS is a sophisticated software that can manipulate mathematical expressions in a symbolic form, much like you would by hand. For example, it can solve for x in `3x + y = 10` or factor `x^2 – 4`. This functionality provides an unfair advantage and is therefore banned.
5. Is the TI-Nspire allowed? It’s confusing.
This is a common point of confusion. The TI-Nspire (non-CAS) is permitted. The TI-Nspire CAS is prohibited. You must check your specific model to see if the letters “CAS” appear on the device.
6. Do I have to clear my calculator’s memory?
Yes, test proctors may require you to clear the memory of your graphing calculator. The official policy requires you to remove any programs that have CAS functionality. It’s best to be prepared to clear all programs and data.
7. What happens if I bring a prohibited calculator?
If you are found with a prohibited calculator during the test, you may be dismissed from the testing center, and your score will be voided. It is your responsibility to ensure your calculator is permitted.
8. Where can I find the official ACT calculator policy?
The most reliable source is the official ACT website. You should always consult it for the latest updates before your test. Our tool is based on the most recent information available from the site. Check the official ACT calculator policy for definitive rules.