SAT and ACT Calculator Rules Checker (2026)
Can you use a calculator on the SAT and ACT? Get an instant answer for your specific test section and understand the detailed policies to be prepared on test day.
Policy Checker
Choose between the SAT and ACT to see the relevant policies.
The rules can change depending on the section of the test.
What are the SAT and ACT Calculator Rules?
The SAT and ACT calculator rules are a set of official policies designed to ensure fairness and test security for all students. These guidelines specify when you can use a calculator, what types are permitted, and which are strictly forbidden. Understanding these rules is critical because using a non-approved device can lead to your dismissal from the test and cancellation of your scores. The primary goal is to prevent any student from having an unfair advantage through advanced computational tools or devices with communication capabilities. Common misconceptions include thinking any calculator is fine, or that a calculator isn’t needed at all. While all questions are solvable without one, a familiar, approved calculator can significantly improve your speed and confidence on math sections.
Official Calculator Policy Breakdown
The policies differ mainly between the two tests and even between sections of a single test. The digital SAT, for instance, includes an embedded Desmos calculator, but you can still bring your own. The ACT allows a calculator on its entire math test but has strict rules against devices with a Computer Algebra System (CAS). This section breaks down the “formula” for what’s allowed.
| Test Section | Calculator Permitted? | Key Rule |
|---|---|---|
| SAT – Math Section | Yes | A calculator is allowed for the entire math section on the digital SAT. Must be a non-CAS model. |
| SAT – Reading & Writing Section | No | Calculators must be put away during this section. |
| ACT – Mathematics Test | Yes | A calculator is permitted for all 60 minutes. However, models with CAS are explicitly banned (e.g., TI-89). |
| ACT – Science, Reading, English Tests | No | Calculators are not permitted on these sections. Use during these parts can lead to dismissal. |
Policy Component Definitions
To fully grasp the SAT and ACT calculator rules, it’s important to know the terminology.
| Term | Meaning | Relevance to SAT/ACT |
|---|---|---|
| Graphing Calculator | A calculator that can plot coordinates and draw graphs. | Generally permitted on both tests, as long as it does not have CAS. The TI-84 Plus is a very common example. |
| Scientific Calculator | Performs logarithmic, exponential, and trigonometric functions. | Allowed on both tests and is often sufficient for most students’ needs. |
| Four-Function Calculator | Performs only basic arithmetic (+, -, ×, ÷). | Allowed, but not recommended due to its limited functionality for complex problems. |
| CAS (Computer Algebra System) | Software that can manipulate mathematical expressions in a symbolic form (e.g., factor polynomials). | Prohibited on both the SAT and ACT. Calculators like the TI-Nspire CAS, TI-89, and HP Prime are banned. |
| QWERTY Keypad | A calculator with a keyboard layout like a computer. | Strictly prohibited on both tests. |
Practical Examples (Real-World Use Cases)
Example 1: Preparing for the SAT
A student named Sarah is taking the digital SAT. She knows she can use the built-in Desmos calculator but feels more comfortable with a handheld device. She owns a TI-84 Plus CE, which she has used for two years in her math classes. According to the SAT and ACT calculator rules, the TI-84 Plus series is approved for the SAT because it is a non-CAS graphing calculator. Sarah decides to practice exclusively with her TI-84 so she is fast and comfortable with it on test day. This is a smart strategy, as familiarity with your device is key.
Example 2: An ACT Student with a Banned Calculator
Leo is signed up for the ACT and his most advanced calculator is the TI-Nspire CX II-T CAS. He checks the ACT’s prohibited list and discovers that all calculators with CAS functionality, including his, are banned. If he brought it to the test, it would be confiscated, and he could be dismissed. Leo must now purchase or borrow a compliant calculator, such as a TI-83 Plus or a standard scientific calculator, and spend time practicing with it before the exam to avoid issues. This highlights the importance of checking the official SAT and ACT calculator rules for your specific device well before the test date.
How to Use This SAT and ACT Calculator Policy Checker
This tool is designed to simplify the official rules. Here’s how to use it effectively:
- Select Your Test: Choose either “SAT” or “ACT” from the first dropdown menu. The available sections will update automatically.
- Select the Test Section: Choose the specific part of the exam you’re curious about, such as “Math (Calculator Section)” or “Mathematics Test.”
- Review the Primary Result: The large colored box will give you an immediate “Yes,” “No,” or “Restricted” answer.
- Examine the Details: Below the main result, the tool will provide a clear explanation and lists of generally permitted and prohibited calculator types for that specific context.
- Use the ‘Reset’ Button: Click this to clear your selections and start over.
By using this checker, you can quickly determine if your calculator strategy aligns with the official SAT and ACT calculator rules.
Key Factors That Affect Calculator Choice & Policy
Navigating the SAT and ACT calculator rules involves more than just owning an approved model. Several factors come into play.
- Test Type (SAT vs. ACT): This is the most significant factor. The ACT has a more extensive list of specifically banned models, particularly those with CAS. The SAT’s policy also bans CAS but is often seen as slightly more straightforward, especially with the embedded digital option.
- Computer Algebra System (CAS): This is the single biggest feature that gets calculators banned. A CAS can solve algebraic equations symbolically, which test-makers consider an unfair advantage. You must ensure your model is non-CAS.
- Device Functionality: Devices with features beyond a calculator are prohibited. This includes phones, smartwatches, laptops, or any device with a camera, internet access, or a QWERTY keyboard.
- Your Familiarity with the Device: Experts and testing agencies agree: the best calculator is the one you know how to use well. Don’t buy a powerful, complex calculator a week before the test.
- Test Center Proctors: While there are official rules, proctors have the final say on test day. If your calculator makes noise, has an exceptionally large display, or seems to have prohibited functions, they have the authority to confiscate it.
- Battery Life: You are responsible for ensuring your calculator is functional. Test centers will not provide batteries or backup calculators. Always bring a spare set of batteries or ensure your device is fully charged.
Frequently Asked Questions (FAQ)
No. Cell phones, smartphones, and any other communication devices are strictly prohibited from use at any time during the test. Using one will result in your immediate dismissal.
Yes, the entire TI-84 Plus series (including Plus, C, CE) is approved for both the SAT and ACT because it does not have a Computer Algebra System (CAS). It is one of the most commonly recommended calculators.
The “CAS” is the key difference. The standard TI-Nspire CX is permitted on both tests, while the TI-Nspire CX CAS model is banned from both because of its symbolic algebra capabilities.
It is not required. All questions can be solved without one. However, for problems involving functions and graphs, a graphing calculator can save a significant amount of time and help you visualize the problem, which is a major advantage.
You are responsible for your own equipment. The testing staff will not provide batteries or a replacement calculator. It is highly recommended to install fresh batteries before the test and/or bring a backup calculator.
No, calculators are only permitted during the Mathematics test of the ACT. You must put it away for the Science, Reading, and English sections.
Yes, the ACT policy states that you must remove any programs that have computer algebra system functionality. While it’s rare for proctors to inspect programs, it is technically part of the official SAT and ACT calculator rules.
Yes, the digital SAT testing platform (Bluebook) has a built-in Desmos graphing calculator that you can use for the entire Math section. You are still allowed to bring your own approved handheld calculator if you prefer.
Related Tools and Internal Resources
- SAT Prep Guide: A complete guide to preparing for all sections of the SAT.
- ACT Math Strategies: Learn key strategies for tackling the ACT math test. This resource complements understanding the SAT and ACT calculator rules by teaching you when and how to best use your tool.
- Best Graphing Calculators 2026: A review of the top approved calculators for college entrance exams.
- Test Day Checklist: Make sure you have everything you need for a smooth test day experience.
- ACT vs. SAT Comparison: A detailed comparison to help you decide which test is right for you.
- Online Tutoring Services: Find expert tutors to help you master the concepts behind the calculations.