ACT® Calculator Permissibility Checker
Instantly determine if your calculator is allowed on the ACT math test based on the official ACT calculator rules.
Check Your Calculator’s Status
Summary of Findings:
- Results will appear here.
Visualizing Prohibited Features
This chart dynamically shows which features make a calculator prohibited. The higher the bar, the more definitive the rule.
| Feature | Status | Required Action |
|---|---|---|
| Standard 4-Function / Scientific | Permitted | None needed. |
| Graphing Calculator (Non-CAS) | Permitted | Ensure no prohibited programs are stored. |
| QWERTY Keyboard | Prohibited | Cannot be used. |
| Computer Algebra System (CAS) | Prohibited | Most CAS calculators are explicitly banned. Cannot be used. |
| Wireless Communication / Internet | Prohibited | Cannot be used. This includes phones, tablets, etc. |
| Makes Noise | Conditional | Sound must be turned off. |
| Paper Tape | Conditional | Tape must be removed. |
| Infrared Port | Conditional | Port must be covered with opaque tape. |
What are the ACT Calculator Rules?
The ACT calculator rules are a set of guidelines established by the ACT organization to ensure fairness and test security for all students during the mathematics portion of the exam. While calculators are permitted on the math test, they are not allowed on any other section, including science. The core principle of the ACT calculator policy is to allow most standard calculators (four-function, scientific, and graphing) while prohibiting devices that could provide an unfair advantage.
Anyone taking the ACT math test should use this policy to verify their device is compliant. The rules are designed to prevent access to stored information, communication with others, or the use of advanced software that can solve problems algebraically. Common misconceptions are that all graphing calculators are banned or that an expensive calculator is needed. In reality, all problems on the ACT can be solved without a calculator, but a familiar, permitted device can help with speed and accuracy.
ACT Calculator Rules: Logic and Explanation
Unlike a mathematical formula, the ACT calculator rules are a logical checklist. The permissibility of a calculator is determined by its features. The “formula” is a series of checks: if a calculator has any prohibited features, it’s not allowed. If it has features that require modification, those changes must be made before the test.
Below is a breakdown of the variables (features) that determine a calculator’s status according to the ACT calculator rules.
| Variable (Feature) | Meaning | Status | Typical Range (Examples) |
|---|---|---|---|
| Device Type | The physical form of the device. | Prohibited | Cell phones, laptops, smartwatches, tablets. |
| Keyboard Style | The layout of letter keys. | Prohibited | QWERTY keyboards like on a computer. |
| CAS Functionality | Computer Algebra System, which performs symbolic manipulation. | Prohibited | TI-89, TI-92, TI-Nspire CAS, HP Prime. |
| External Power | Requires an electrical cord to operate. | Prohibited | Any calculator needing a wall outlet. |
| Sound/Printing | Features that can cause disruption. | Conditional | Calculators that beep or have a paper tape. |
Practical Examples (Real-World Use Cases)
Example 1: The Prohibited Calculator
A student wants to bring a TI-89 Titanium to the test. They use the checker and select “Yes” for “Does it have a Computer Algebra System (CAS)?”. The result is immediately “PROHIBITED”. The reason is that the ACT calculator rules explicitly ban calculators with CAS, as they can perform algebraic manipulations that undermine what the test is designed to measure.
Example 2: The Permitted Calculator
Another student has a TI-84 Plus. They check the features: no QWERTY keyboard, not part of a phone, no CAS, and battery-powered. They answer “No” to all the primary prohibiting questions. The result is “PERMITTED”. This calculator is one of the most common for the ACT because it provides powerful graphing capabilities without violating the ACT calculator rules.
How to Use This ACT Calculator Rules Checker
- Answer the Questions: Go through each question in the form above. Select “Yes” or “No” based on the features of your specific calculator.
- Review the Result: As you answer, the result box will update in real-time. It will show “PERMITTED” (Green), “PROHIBITED” (Red), or “CONDITIONAL” (Yellow).
- Read the Reasons: Below the main result, a list will explain *why* your calculator received that status. For example, it might state “Reason: Device is prohibited because it has a QWERTY keyboard.”
- Consult the Chart: The bar chart provides a visual guide to the most significant prohibited features, helping you understand the ACT calculator rules at a glance.
This tool helps you quickly assess your device. If your calculator is prohibited, you know you need to find an alternative. If it’s permitted, you can feel confident bringing it on test day. See our guide on what to bring to the ACT for more tips.
Key Factors That Affect ACT Calculator Permissibility
Understanding the details of the ACT calculator rules is crucial. Several key factors can render a calculator prohibited. Here are six of the most important ones.
- Computer Algebra System (CAS): This is the most critical factor. Calculators with CAS can solve equations symbolically, which is a skill the ACT math test is designed to assess. Therefore, nearly all CAS calculators are banned.
- QWERTY Keypad: Any calculator with a typewriter-style (QWERTY) keyboard is not allowed. This is to prevent the storage and use of text notes.
- Communication Capability: Devices that can communicate with other devices are strictly forbidden. This includes cell phones, tablets, smartwatches, and laptops.
- External Power Requirement: Your calculator must be battery-operated. Models that require an electrical outlet are not permitted in the testing room.
- Noise and Printing: Calculators that make noise or have a built-in paper printer are considered disruptive. These features must be disabled or removed before you can use the calculator.
- Pen-Input or Stylus Use: Devices that function as electronic writing pads or use a stylus are generally not allowed, with very few exceptions.
For more details on test strategy, see our article on ACT math section tips.
Frequently Asked Questions (FAQ)
1. Can I use a calculator on the ACT Science section?
No, calculators are only permitted on the mathematics section of the ACT. They are prohibited on the Reading, English, and Science sections.
2. What happens if I’m caught with a prohibited calculator?
If a proctor finds you are using a prohibited calculator, you may be dismissed from the test, and your score will be voided. It is your responsibility to ensure your calculator complies with the ACT calculator rules.
3. Is the TI-Nspire allowed on the ACT?
It depends on the model. The standard TI-Nspire (non-CAS) is permitted. However, the TI-Nspire CAS is explicitly prohibited.
4. Do I need to clear the memory on my calculator?
The ACT requires you to remove any programs that have computer algebra system functionality. While proctors may not always check, it is best practice to clear any non-essential programs or data to be safe.
5. What if my calculator’s batteries die during the test?
You are responsible for ensuring your calculator is in working order. The testing staff will not provide batteries. You are allowed to bring a backup calculator and extra batteries.
6. Are four-function calculators sufficient for the ACT?
Yes. All questions on the ACT can be solved without a calculator. A four-function calculator is sufficient, although a scientific or graphing calculator may help you solve some problems faster.
7. How do the ACT calculator rules compare to the SAT?
The policies are similar, but have slight differences. Both ban phone/tablet calculators and those with QWERTY keyboards. It’s always best to check the specific policy for each test. For more info, check our SAT vs. ACT comparison.
8. Where can I find the official ACT calculator rules?
The definitive source for the ACT calculator rules is the official ACT website. This calculator and article are based on those rules, but you should always confirm with the official source before test day.