ACT Approved Calculator Checker
Instantly determine if your calculator model is permitted for use on the ACT test.
Enter the full model name of your calculator to check its ACT eligibility.
CAS functionality can perform symbolic algebra (e.g., solve for x). Most calculators with “CAS” in the model name have this.
Calculators with typewriter-like keyboards are prohibited.
What is an ACT Approved Calculator?
An ACT approved calculator is any four-function, scientific, or graphing calculator that is permitted for use on the mathematics portion of the ACT test. The ACT has a specific policy designed to ensure fairness and test security. While most calculators are allowed, certain models and features are explicitly prohibited. Knowing whether your device is an ACT approved calculator before test day is crucial to avoid any issues. Using a familiar and permitted calculator can help you work through problems more efficiently, though it’s important to remember that all questions on the ACT math test can be solved without a calculator.
The core principle behind the ACT calculator policy is to prevent any student from having an unfair advantage. This means devices with advanced communication features, computer-like functionality, or systems that can solve algebraic equations symbolically are not allowed. Therefore, every student should verify their device against the official list of rules to confirm they are bringing an ACT approved calculator.
ACT Calculator Policy Explained: Rules & Prohibited Features
There isn’t a mathematical formula for determining an ACT approved calculator, but a strict set of rules. The policy explicitly forbids certain types of calculators and features. Understanding these rules is the key to knowing if your calculator will be allowed.
Primary Prohibited Feature: Computer Algebra System (CAS)
The most significant rule is the prohibition of calculators with Computer Algebra System (CAS) functionality. A CAS can manipulate and solve algebraic expressions symbolically, which is considered an unfair advantage. Any calculator with CAS is not an ACT approved calculator. This includes popular models like the TI-89, TI-92, and TI-Nspire CAS.
Other Prohibited Features and Devices:
- QWERTY Keyboards: Calculators with a typewriter-style keyboard layout are not allowed.
- Communication Devices: Cell phones, tablets, smartwatches, laptops, or any device with internet or communication capabilities are strictly forbidden.
- Calculators that need modification: Some calculators are only permitted if modified. For example, devices with paper tape must have the tape removed, those that make noise must be muted, and those with infrared data ports must have the port covered with opaque tape.
| Variable / Feature | Meaning | Status | Typical Range / Examples |
|---|---|---|---|
| Calculator Type | The category of the calculator. | Permitted | 4-Function, Scientific, Graphing |
| CAS Functionality | Computer Algebra System (solves algebra symbolically). | Prohibited | TI-89, TI-Nspire CAS, HP Prime |
| QWERTY Keyboard | A typewriter-style lettered keyboard. | Prohibited | N/A (no modern calculators have this) |
| Infrared Port | A port for wireless data transfer. | Modification Required | HP 38G/39G/48G series (must be taped) |
| Noise / Paper Tape | Calculators that make sounds or print. | Modification Required | Sound must be off; tape must be removed |
Practical Examples of ACT Approved Calculator Checks
Example 1: Is the TI-84 Plus CE an ACT approved calculator?
- Model: Texas Instruments TI-84 Plus CE
- CAS Check: This model does NOT have a Computer Algebra System. The non-CAS TI-Nspire is also permitted.
- QWERTY Check: It does not have a QWERTY keyboard.
- Verdict: Permitted. The TI-84 Plus series is one of the most common and reliable ACT approved calculator models.
Example 2: Is the TI-89 Titanium an ACT approved calculator?
- Model: Texas Instruments TI-89 Titanium
- CAS Check: This model explicitly has a Computer Algebra System. All models beginning with TI-89 or TI-92 are prohibited for this reason.
- QWERTY Check: It does not have a QWERTY keyboard.
- Verdict: Prohibited. Due to its powerful CAS functionality, the TI-89 is not an ACT approved calculator.
How to Use This ACT Approved Calculator Checker
This tool simplifies the process of checking if your calculator is allowed. Follow these simple steps:
- Enter Your Calculator Model: Type the model name (e.g., “TI-84 Plus”) into the input field. The tool will auto-check against a list of known prohibited models.
- Specify CAS and Keyboard Features: Use the dropdown menus to indicate if your calculator has a Computer Algebra System or a QWERTY keyboard. If you’re unsure about CAS, check your calculator’s manual or look for “CAS” in the model name.
- Review the Result: The tool will provide an instant result: “Permitted,” “Prohibited,” or “Review Required.” The explanation will clarify why the decision was made.
- Decision Making: A “Permitted” result means you’re good to go. A “Prohibited” result means you need to get a different calculator for the test. “Review Required” suggests your calculator may need modification (like taping a port) or it has questionable features, and you should double-check the official ACT website.
Key Factors That Affect ACT Calculator Eligibility
Several factors determine whether a device is considered an ACT approved calculator. Understanding these will help you choose the right tool for test day.
1. Computer Algebra System (CAS)
This is the most critical factor. The ability to perform symbolic manipulation (like factoring, expanding, and solving equations with variables) is the primary reason a calculator is banned. A calculator that only performs numerical calculations is generally safe.
2. QWERTY Keypad
Any calculator with a typewriter-style (QWERTY) keyboard is prohibited. This rule prevents devices that resemble computers or communication devices.
3. Communication Capabilities
Any feature that allows the calculator to communicate with other devices wirelessly (like Wi-Fi or Bluetooth) is forbidden. This also includes older infrared ports, which must be covered.
4. Power Source
Calculators that require an electrical outlet are not permitted. Your device must be battery-powered. Make sure you have fresh batteries before the test!
5. Stored Programs and Documents
If your calculator can store programs or documents, you must remove anything that has CAS functionality. It’s a good practice to clear your calculator’s memory before the test.
6. Noise and Printing
Calculators that make noise or have a paper tape printer must be modified. The sound must be turned off, and the paper tape must be removed.
Frequently Asked Questions (FAQ)
1. Can I use a TI-Nspire on the ACT?
It depends. The standard TI-Nspire (non-CAS) is a permitted ACT approved calculator. However, the TI-Nspire CAS model is strictly prohibited due to its Computer Algebra System. You must ensure your model does not have “CAS” printed on it.
2. Is a scientific calculator a good ACT approved calculator?
Yes, a scientific calculator is an excellent choice. It has all the necessary functions for trigonometry and logarithms without the risk of having prohibited features like a CAS.
3. What if my calculator is not on the prohibited list but has a banned feature?
The feature takes precedence. If your calculator has a CAS or a QWERTY keyboard, it is prohibited even if the model name isn’t on a specific list. The rules apply to all devices.
4. Do I have to clear the memory on my graphing calculator?
You must clear any programs or documents that have CAS functionality. Proctors may inspect your calculator, so it’s best to clear any non-essential programs to be safe.
5. Can I share my ACT approved calculator with another student?
No. Sharing calculators during the test is strictly forbidden and could lead to both students being dismissed.
6. What happens if I bring a prohibited calculator to the test?
If you are found using a prohibited calculator during the test, you will likely be dismissed, and your test score will be voided. It is your responsibility to bring an ACT approved calculator.
7. Are four-function calculators allowed?
Yes, four-function calculators are permitted. However, they are not recommended as they lack the scientific and graphing functions that are very helpful for the ACT math section.
8. Where can I find the most current ACT calculator policy?
Always check the official ACT website (act.org) for the latest version of the calculator policy. Rules can change, and the official site is the definitive source for any ACT approved calculator list.