ACT Calculator Policy Checker
Determine if your calculator is permitted on the ACT test. This tool helps you understand the rules for what calculator is allowed on the act, preventing test-day surprises.
Check Your Calculator’s Status
What is the ACT Calculator Policy?
The ACT calculator policy is a set of rules established by the ACT organization to ensure fairness and test security for all students. The core question for students is often, “what calculator is allowed on the act?” While most calculators, including graphing ones, are permitted, the policy explicitly prohibits devices with certain advanced functionalities that could provide an unfair advantage. Understanding these rules is critical for a smooth test-day experience.
This policy applies only to the Mathematics section of the ACT. Calculators are not permitted on the Reading, English, or Science sections. The goal is to allow students to use a familiar tool to save time on complex calculations, but not to solve problems that test foundational mathematical reasoning. Every problem on the ACT Math test can be solved without a calculator.
Common Misconceptions
A frequent misconception is that all graphing calculators are banned, which is untrue. Many popular graphing calculators like the TI-84 Plus series are perfectly acceptable. The primary restriction is on calculators with a Computer Algebra System (CAS). Another myth is that the test center provides calculators; they do not. Students must bring their own approved device.
ACT Calculator Policy: The Rules and Logic Explained
Instead of a mathematical formula, the decision for what calculator is allowed on the act is based on a logical framework of rules. The ACT policy operates on an “allowed unless prohibited” basis. You can generally use any 4-function, scientific, or graphing calculator as long as it doesn’t appear on the official prohibited list or have specific forbidden features.
The evaluation logic can be broken down into these steps:
- Check for Explicit Prohibition: The calculator model is checked against a known list of banned devices (e.g., TI-89, HP Prime).
- Identify Prohibited Features: The device is checked for features that are universally banned, such as a QWERTY keyboard, wireless communication capability, or the need for an electrical outlet.
- Detect Computer Algebra System (CAS): This is the most critical rule. A CAS can perform symbolic algebra, such as factoring, solving algebraic equations, and finding derivatives. Models with CAS are strictly forbidden because they undermine the skills the test is designed to measure.
- Check for Required Modifications: Some calculators are allowed only if modified. This includes clearing programs, removing paper tape, or covering an infrared data port.
| Variable (Feature) | Meaning | Status | Typical Models Affected |
|---|---|---|---|
| CAS Functionality | Ability to perform symbolic algebraic manipulation. | Prohibited | TI-89, TI-92, TI-Nspire CAS, HP Prime |
| QWERTY Keyboard | A lettered keyboard in the standard typewriter layout. | Prohibited | Older models or PDA-like devices |
| Wireless/Internet | Any form of communication (Bluetooth, Wi-Fi). | Prohibited | Smartphones, tablets, smartwatches |
| Programs/Documents | Stored programs or notes on the calculator. | Requires Modification (Must be cleared) | Most graphing calculators (e.g., TI-84 Plus) |
| Infrared Port | Allows calculator-to-calculator communication. | Requires Modification (Must be covered) | HP 38G, 39G, 48G series |
Practical Examples (Real-World Use Cases)
Example 1: Checking a TI-84 Plus CE
- Input: User enters “TI-84 Plus CE”.
- Logic: The checker identifies this model. It is not on the explicit prohibited list. It does not have a CAS or a QWERTY keyboard. It is one of the most common ACT approved calculators. The only consideration is that any programs must be cleared.
- Output: The calculator status is “Allowed,” with a note that memory and programs should be cleared before the test.
Example 2: Checking a TI-89 Titanium
- Input: User enters “TI-89 Titanium”.
- Logic: The checker immediately flags this model. The “89” in the model name is a strong indicator of a prohibited device. This model is well-known for having a powerful Computer Algebra System (CAS).
- Output: The calculator status is “Prohibited.” The reason given is the presence of a CAS, which violates the core principle of the policy regarding what calculator is allowed on the act.
How to Use This ACT Calculator Policy Checker
Using this tool is straightforward and designed to give you a quick and accurate answer about your calculator’s eligibility.
- Enter Your Calculator Model: Type the full name of your calculator (e.g., “TI-30XS MultiView”) into the input field. The more specific, the better.
- Review the Results: The tool will instantly display one of three statuses:
- Allowed: Your calculator is permitted for use on the ACT Math test.
- Prohibited: Your calculator is not allowed. You must bring a different one.
- Check / Requires Modification: Your calculator may be allowed, but you need to take specific action, such as clearing its memory or covering a port. The result will provide details.
- Understand the Details: The intermediate results explain the basis for the decision, any prohibited features found, and the required action. The dynamic chart also visualizes which, if any, prohibited features were identified. For more info, see our guide on ACT math tips.
Key Factors That Affect Calculator Eligibility
Several key features determine the answer to “what calculator is allowed on the act?”. Understanding these factors will help you choose the right device.
- 1. Computer Algebra System (CAS)
- This is the number one reason a calculator is banned. A CAS can solve ‘x’ in 3x+9=15, while a non-CAS calculator cannot. The ACT requires you to perform that algebra yourself.
- 2. QWERTY-style Keyboard
- Devices with a typewriter-style keyboard are prohibited as they resemble small computers and could be used for storing notes.
- 3. Communication Ability
- Any calculator that can communicate wirelessly (e.g., via Bluetooth, Wi-Fi, or infrared) is banned to prevent cheating. Some older models with infrared ports are allowed only if the port is completely covered with opaque tape.
- 4. Power Source
- Calculators that need an electrical outlet are not allowed. Your device must be battery-operated.
- 5. Noise and Printing
- Calculators that make noise must be muted. Models with a paper tape printer are only allowed if the tape is removed.
- 6. Stored Programs and Data
- While you can use a calculator with programming capabilities (like a TI-84), you are not supposed to use pre-written programs to solve questions. Proctors may inspect your calculator and require you to clear its memory. It is a critical part of knowing what calculator is allowed on the act.
Frequently Asked Questions (FAQ)
1. Are graphing calculators allowed on the ACT?
Yes, most graphing calculators are allowed, provided they do not have a Computer Algebra System (CAS). Popular models like the TI-84 Plus and Casio fx-9750GII are permitted. This is a common point of confusion when asking what calculator is allowed on the act.
2. Is the TI-84 Plus CE allowed on the ACT?
Yes, the TI-84 Plus CE is one of the most popular and widely approved calculators for the ACT. It does not have CAS functionality.
3. What is a Computer Algebra System (CAS) and why is it banned?
A CAS is a sophisticated program that can manipulate algebraic expressions symbolically. For example, it can solve equations, factor polynomials, and compute derivatives. It is banned because it performs the exact skills the ACT Math test is designed to assess.
4. Can I use my phone’s calculator app?
No, all devices with phone, tablet, or laptop functionality are strictly prohibited, even if you only intend to use the calculator app. Using such a device will lead to dismissal from the test.
5. Do I need to clear my calculator’s memory?
The ACT policy states that calculators with stored programs or documents must be cleared. While proctors don’t always check this, it is the official rule and you should be prepared to clear the memory. You can get more information on our official act test dates page.
6. What happens if I bring a prohibited calculator?
If a proctor discovers you are using a prohibited calculator, you may be dismissed from the testing center and your scores will be voided. It is your responsibility to know what calculator is allowed on the act.
7. Are all scientific calculators allowed?
Yes, virtually all standard scientific calculators are allowed on the ACT. They do not contain the prohibited features like CAS or QWERTY keyboards. A good scientific calculator is often sufficient.
8. Can I use the calculator on the ACT Science section?
No, calculators are only permitted during the Math section of the ACT. They are not allowed on the English, Reading, or Science sections.