ACT Allowable Calculator Checker
An interactive tool to quickly determine if your calculator meets the official ACT test day policy.
Is Your Calculator ACT-Approved?
Answer the following questions about your calculator’s features to check its eligibility for the ACT test. This checker is based on the latest ACT allowable calculator policy.
Analysis Summary
What is an ACT Allowable Calculator?
An ACT allowable calculator is not a specific brand or model, but rather any calculator that meets the strict guidelines set by the ACT for use during the mathematics portion of the test. The policy is designed to ensure fairness and prevent any student from having an unfair advantage. While you can solve all ACT math problems without a calculator, using a familiar and permitted tool can significantly improve your speed and accuracy on complex questions.
This policy primarily applies to students taking the ACT, but also to educators and test administrators who need to enforce the rules. The core idea is to allow tools for computation (like scientific and graphing calculators) while banning devices that can store large amounts of text, communicate wirelessly, or perform symbolic algebra. Understanding the nuances of the ACT allowable calculator policy is a critical part of preparing for test day.
Common Misconceptions
A frequent misunderstanding is that only expensive graphing calculators are useful. In reality, a student proficient with a scientific calculator can be just as efficient. Another myth is that all graphing calculators are allowed; however, models with a Computer Algebra System (CAS) are strictly prohibited. Finally, students must bring their own calculator, as test centers do not provide them. For more help on your test journey, check out our guide to ACT prep courses.
Understanding the ACT’s Calculator Rules
Instead of a mathematical formula, the ACT allowable calculator policy is a set of logical rules. A calculator is deemed “allowable” if it does NOT possess any of the key prohibited features. The logic can be expressed as:
Allowable = (NOT a Prohibited Device) AND (Has NO Prohibited Features) OR (Is a Modified, Permitted Device)
This means a calculator must be a dedicated calculating device and must not have banned functions like CAS or a QWERTY keyboard. Some calculators with features like program storage or infrared ports are permitted, but only if they are modified according to ACT rules (e.g., programs cleared, ports covered).
Feature & Rule Summary Table
| Feature/Variable | Meaning | Status | Typical Range/Examples |
|---|---|---|---|
| Computer Algebra System (CAS) | Ability to solve equations symbolically (e.g., solve for x). | Prohibited | TI-89, TI-Nspire CAS, HP Prime |
| QWERTY Keyboard | A typewriter-style keyboard layout. | Prohibited | Any calculator with this layout. |
| Communication Device | Part of a phone, tablet, or laptop. | Prohibited | iPhones, Androids, smartwatches |
| Graphing Capability | Ability to plot functions on a coordinate plane. | Allowed | TI-84 Plus, TI-Nspire (non-CAS) |
| Scientific Functions | Includes trig, logs, and exponent functions. | Allowed | TI-30XS, Casio fx-300ES Plus |
| Infrared Data Port | Allows calculator-to-calculator communication. | Modification Required | Must be covered with opaque tape. |
Practical Examples (Real-World Use Cases)
Example 1: The Standard Approved Calculator
- Calculator Model: Texas Instruments TI-84 Plus CE
- Inputs to Checker: CAS (No), QWERTY (No), Device (No), Power (No), Infrared (No)
- Output: Allowed
- Interpretation: The TI-84 Plus CE is one of the most popular and widely accepted calculators for the ACT. It has powerful graphing capabilities but does not include a prohibited Computer Algebra System, making it a perfect example of an ACT allowable calculator.
Example 2: The Prohibited CAS Calculator
- Calculator Model: Texas Instruments TI-89 Titanium
- Inputs to Checker: CAS (Yes), QWERTY (No), Device (No), Power (No), Infrared (No)
- Output: Prohibited
- Interpretation: The TI-89 is explicitly banned by the ACT because it contains a Computer Algebra System (CAS). Even though it is a powerful tool for learning math, its ability to perform symbolic algebra gives an unfair advantage on a standardized test. This is a clear case where a device is not an ACT allowable calculator. For more insights, review our ACT math guide.
How to Use This ACT Allowable Calculator Checker
Using this tool is a straightforward process to ensure your test day goes smoothly. Follow these steps to verify your calculator’s status.
- Examine Your Calculator: Look for key features. Does it have a “CAS” button? Does the keyboard look like a computer’s? Is it a standalone device?
- Answer the Questions: For each question in the tool above, select “Yes” or “No” based on your calculator’s features.
- Click “Check Eligibility”: Once you have answered all the questions, press the button to process the information.
- Review Your Results: The tool will provide a primary result: “Allowed,” “Prohibited,” or “Check Manually.” An explanation will detail which rules your calculator passed or failed.
- Take Action: If your calculator is prohibited, you know you need to find a different one for the test. If it’s allowed, you can be confident on test day. Use our guide to choosing a graphing calculator for more help.
Key Factors That Affect ACT Allowable Calculator Status
Several critical factors determine whether a device is considered an ACT allowable calculator. Understanding these will help you choose the right tool.
- 1. Computer Algebra System (CAS)
- This is the most common reason for a graphing calculator to be banned. CAS allows a calculator to solve for variables and simplify expressions, which goes beyond the intended scope of the test.
- 2. QWERTY Keyboards
- Any calculator with a keyboard laid out like a computer (QWERTY format) is prohibited. This rule prevents the use of devices that could be used for typing notes.
- 3. Communication Technology
- Calculators that are part of a phone, tablet, or any device that can communicate wirelessly (Wi-Fi, Bluetooth) are strictly forbidden to maintain test security.
- 4. Power Source
- The calculator must be battery-powered. Devices that require an external power cord or plug are not permitted in the testing room.
- 5. Noise and Peripherals
- Calculators that make noise must be muted. Those with paper tape must have the tape removed before the test begins.
- 6. Stored Programs and Documents
- If your calculator can store programs or documents, you must clear them before the test, especially any programs that add CAS-like functionality. Exploring this topic further can be done by looking at the ACT vs SAT comparison.
Frequently Asked Questions (FAQ)
1. Is the TI-Nspire allowed on the ACT?
It depends on the model. The TI-Nspire (non-CAS) is allowed, but the TI-Nspire CAS is explicitly prohibited. You must check your calculator to see if the letters “CAS” appear on the device.
2. Can I use a four-function calculator?
Yes, basic four-function calculators are allowed. However, they are not recommended as they lack the functions (trigonometry, exponents) needed for many higher-level math questions on the ACT.
3. What happens if I bring a prohibited calculator?
If you are caught with a prohibited calculator during the test, the proctor may dismiss you, and your test score will be voided. It is your responsibility to ensure you have an ACT allowable calculator.
4. Do I have to clear the memory on my calculator?
You must remove any programs that have computer algebra system functionality. It’s a good practice to clear all programs and documents to be safe and comply with the ACT allowable calculator policy.
5. Can I share my calculator with another student?
No, sharing calculators during the test is not permitted under any circumstances.
6. What’s the best ACT allowable calculator to buy?
The “best” calculator is one you are comfortable with. Many students prefer the TI-84 Plus series for its balance of functionality and ease of use. A powerful scientific calculator like the TI-30XS is also an excellent, budget-friendly choice.
7. Are there any exceptions to the CAS rule?
No, the ACT has a strict policy against calculators with built-in CAS functionality. There are no exceptions for any model with this feature. Checking the official test day checklist is always recommended.
8. Can I use the calculator on all sections of the ACT?
No, calculators are only permitted during the 60-minute Mathematics section. Use during any other section is prohibited.