What Calculator is Allowed on the ACT?
Instant verification tool based on the official ACT Test Day Policy.
Calculators with these features are strictly prohibited by ACT rules.
| Brand/Series | Model Examples | ACT Status | Special Note |
|---|---|---|---|
| Texas Instruments | TI-84 Plus, TI-30XS, TI-34 | Allowed | No restrictions for these. |
| Texas Instruments | TI-89, TI-92, Nspire CAS | Prohibited | Built-in CAS is the reason. |
| Casio | fx-9750GII, fx-9860GII | Allowed | Popular reliable choices. |
| HP | HP Prime | Prohibited | CAS functionality is built-in. |
What is the ACT Calculator Policy?
Understanding what calculator is allowed on the ACT is critical for every student aiming for a high score. Unlike the SAT, which permits many calculators with Computer Algebra Systems (CAS), the ACT strictly prohibits any device that can solve algebraic equations symbolically. This means popular models like the TI-89 or the TI-Nspire CAS are strictly banned from the testing room.
The policy exists to ensure that the ACT Math section measures a student's mathematical reasoning and problem-solving skills rather than their ability to operate complex software. Using a prohibited calculator can lead to immediate dismissal and cancellation of your scores. Who should use this checker? Students, parents, and tutors who want to verify their equipment before the big day.
Common Misconceptions
- "Any graphing calculator is fine." Incorrect. Many graphing calculators have CAS features that make them illegal.
- "I can just turn off the CAS." Incorrect. If the model is on the prohibited list, it doesn't matter if you "disable" the features; it is still banned.
- "The proctors don't check." Dangerous assumption. Proctors are trained to look for specific models like the TI-89 and the TI-Nspire CAS.
What Calculator is Allowed on the ACT: Formula and Logic
Compliance is determined by a binary logic gate system. If a calculator triggers any of the "Prohibited" flags, its status becomes "Banned."
| Variable | Meaning | Requirement | Pass Range |
|---|---|---|---|
| CAS | Computer Algebra System | Must be Absent | No / Disabled by Factory |
| KBD | Keyboard Layout | Non-QWERTY | ABC or Grid layout |
| COM | Communication Ability | None | No Wifi/Bluetooth |
| PWR | Power Source | Battery/Solar | No Power Cords |
Practical Examples
Example 1: The TI-84 Plus CE
A student brings a TI-84 Plus CE. This model does not have a CAS, does not have a QWERTY keyboard, and lacks wireless communication. Result: Allowed. This is one of the most popular calculators for the ACT.
Example 2: The TI-Nspire CAS
A student brings the Nspire model with "CAS" printed on the top right. Even though it is a graphing calculator, the symbolic algebra capability triggers a violation. Result: Prohibited.
How to Use This Calculator Checker
- Select your calculator brand and model from the dropdown menu.
- Check any specific hardware features your device has (e.g., QWERTY keys).
- Review the result: "Allowed" or "Prohibited."
- If prohibited, consult our graphing calculator guide for a better alternative.
Key Factors That Affect ACT Compliance
1. CAS Functionality: The single most common reason for a ban. If your calculator can solve for 'x' in an equation like 2x + 5 = 11 without you doing the work, it's likely prohibited.
2. Keyboard Layout: Calculators with letter keys in the QWERTY format (like a computer) are banned because they resemble communication devices.
3. Noise and Distraction: Calculators that make noise or have "raised" paper tape printers are not allowed as they disturb other test-takers.
4. External Power: You cannot plug your calculator into a wall outlet. It must be battery or solar-powered.
5. Hardware Modifications: Any calculator that has been modified (e.g., removal of the protective cover or adding external chips) will be confiscated.
6. Screen Size and Stylus: Devices with touchscreens that require a stylus or are excessively large (like tablets) are not considered calculators by ACT standards.
Frequently Asked Questions (FAQ)
Can I bring two calculators to the ACT?
Yes, you can bring a backup. However, only one calculator can be on your desk at a time. The backup must stay on the floor under your desk.
What if my TI-84 has a custom program?
Programs are generally allowed as long as they don't mimic CAS functionality. However, proctors have the right to inspect or clear your memory.
Is the TI-Nspire CX allowed?
The TI-Nspire CX (Non-CAS) is Allowed. The TI-Nspire CX CAS is Prohibited. Check your labels carefully.
Do I need a graphing calculator for the ACT?
No, a scientific calculator is sufficient, but a graphing calculator can save time on coordinate geometry problems. Check our math prep tips for more info.
Are "C" batteries allowed for older models?
Yes, any standard battery type is fine as long as the device is portable and self-contained.
Will the proctor clear my memory?
The ACT does not require proctors to clear memory, but they may do so if they suspect prohibited programs are being used. Check the test day checklist for prep instructions.
Can I use my phone's calculator app?
Absolutely not. Any use of a cell phone or smart watch during the exam will lead to an immediate ban from the testing center.
What happens if my calculator dies?
Proctors do not provide batteries or spare calculators. Always check your charge or bring spares according to our ACT scoring guide prep section.
Related Tools and Internal Resources
- ACT Test Dates: Stay updated on the latest registration deadlines.
- SAT vs ACT Calculator: Compare your scores across the two major college entrance exams.
- ACT Scoring Guide: Understand how your math answers translate to a 1-36 score.
- Math Prep Tips: Strategies for completing the 60 questions in 60 minutes.
- Test Day Checklist: Everything you need to pack besides your calculator.
- Graphing Calculator Guide: Which model is best for your specific math level?