ACT Calculator Policy Checker & Guide 2026
A quick and easy tool to verify if your calculator is permitted on the ACT test.
Check Your Calculator’s Status
Reasoning
Details about why the calculator is or is not permitted will appear here.
Official Policy Reference
The official ACT calculator policy states that most 4-function, scientific, and graphing calculators are allowed, provided they are not on the prohibited list. Key prohibited features include Computer Algebra Systems (CAS), QWERTY keyboards, and wireless communication.
Prohibited Feature Check
This chart highlights features that commonly lead to a calculator being prohibited. Green means OK, Red means the feature is present and prohibited.
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 during the mathematics portion of the exam. The policy specifies which calculators are permitted, which are strictly prohibited, and which require modification before use. The primary goal is to prevent students from gaining an unfair advantage through devices with advanced functionalities, such as the ability to solve algebraic equations symbolically (a feature of Computer Algebra Systems, or CAS). Common misconceptions are that all graphing calculators are banned or that you need the most expensive model. In reality, many standard graphing calculators are perfectly acceptable, while some seemingly basic ones might have prohibited features.
Understanding the ACT’s Rules
Instead of a single mathematical formula, the ACT calculator policy is based on a checklist of features. A calculator is evaluated based on what it can do. The ACT explicitly prohibits calculators that have features which would undermine the integrity of the math test. The core principle is that the calculator should be a tool for computation, not for solving problems conceptually.
Prohibited Features Table
This table breaks down the key features that determine a calculator’s eligibility. Understanding these is crucial to following the ACT calculator policy.
| Feature | Meaning | Why It’s Prohibited | Commonly Found In |
|---|---|---|---|
| Computer Algebra System (CAS) | The calculator can manipulate and solve algebraic expressions symbolically (e.g., solve for ‘x’). | It performs the algebraic reasoning that the test is designed to measure. | TI-89, TI-Nspire CAS, HP Prime |
| QWERTY Keyboard | A typewriter-style keyboard. | It facilitates storing notes and could be used for communication. | Older models, not common now |
| Wireless/Internet Capability | Features like Wi-Fi, Bluetooth, or infrared ports. | Prevents communication with other devices or accessing the internet. | Some HP models (infrared), smartphones |
| Needs External Power | The device must be plugged into a wall outlet to function. | Testing centers cannot guarantee access to power outlets for every student. | Laptops, tablets |
Table explaining features that make a calculator non-compliant with the ACT calculator policy.
Practical Examples (Real-World Use Cases)
Example 1: The Standard Graphing Calculator
A student has a Texas Instruments TI-84 Plus. They check it using the calculator. The result is “Permitted.” The reason is that the TI-84 Plus is a standard graphing calculator without a Computer Algebra System (CAS). It is one of the most common and recommended calculators for the ACT. The student can bring it to the test with confidence.
Example 2: The Advanced CAS Calculator
Another student has a Hewlett-Packard HP Prime. They enter the model, and the result is “Prohibited.” The reasoning provided is that the HP Prime contains a built-in Computer Algebra System (CAS), which is explicitly banned by the ACT calculator policy. The student must find an alternative, non-CAS calculator for the test day to avoid being disqualified.
How to Use This ACT Calculator Policy Checker
- Find Your Calculator Model: Look at the face, top, or back of your calculator to find the exact model number (e.g., TI-Nspire CX, not just TI).
- Enter the Model: Type the full model name into the input field above.
- Review the Result: The tool will instantly display one of three statuses:
- Permitted: You can use this calculator on the ACT.
- Prohibited: You cannot use this calculator. The reason will be explained.
- Modification Required: You can use the calculator, but only after making specific changes (like covering an infrared port).
- Check the Details: Read the “Reasoning” box for a specific explanation based on the ACT calculator policy.
Key Factors That Affect Calculator Permissibility
Several factors can affect whether your calculator is allowed. Adhering to the ACT calculator policy is crucial.
- Computer Algebra System (CAS): This is the most common reason for a calculator to be prohibited. These systems solve algebra for you, which is against the rules.
- QWERTY Keyboards: Any device with a typewriter-like keyboard is banned.
- Communication Ability: Calculators with infrared ports, Bluetooth, or Wi-Fi are not allowed. Infrared ports on models like the HP 38G/39G/48G series must be covered with opaque tape.
- Power Source: Calculators that need to be plugged in are not permitted. Your device must be battery-powered.
- Noise and Printing: Calculators that make noise must be muted, and those with a paper tape feature must have the tape removed.
- External Devices: You cannot use a calculator on a laptop, tablet, or cell phone. These devices are strictly forbidden.
Frequently Asked Questions (FAQ)
1. Can I use a calculator on all sections of the ACT?
No, calculators are only permitted during the Mathematics Test. Use during any other section is prohibited.
2. What happens if I bring a prohibited calculator?
Test staff will identify it, and you will not be allowed to use it. In some cases, you could be dismissed from the test, and your score voided.
3. Is the TI-Nspire allowed?
It depends. The standard TI-Nspire and TI-Nspire CX are permitted. However, the TI-Nspire CAS and TI-Nspire CX CAS models are strictly prohibited.
4. Do I need a graphing calculator for the ACT?
No, all math problems on the ACT can be solved without a calculator. However, a familiar scientific or graphing calculator can help you solve problems faster and more accurately.
5. What is the best calculator for the ACT?
The “best” calculator is one you are familiar with that is permitted under the ACT calculator policy. Popular and reliable choices include the TI-84 Plus series and the TI-36X Pro.
6. Can I share my calculator with another student?
No. Sharing calculators during the test is not permitted and can lead to disqualification.
7. What if my calculator’s batteries die during the test?
You are responsible for ensuring your calculator is working. Test staff will not provide batteries or a replacement. It is highly recommended to install fresh batteries before the test or bring a permitted backup.
8. Is the online Desmos calculator available for the ACT?
For students taking the digital version of the ACT, a Desmos graphing calculator is embedded within the testing platform. It’s important to practice with this version if you plan to take the digital test.