What Calculators Are Allowed on the ACT: 2024 Guide
The ACT allows most standard calculators, but only if they meet specific guidelines. The test does not provide calculators, so students must bring their own. Only the Math section permits calculator use, and the device must not have features that could be used for cheating or give an unfair advantage. Knowing what is allowed helps avoid problems on test day.
Types of Approved Calculators
The ACT allows basic, scientific, and graphing calculators as long as they do not include restricted functions. Basic calculators handle simple arithmetic. Scientific models add functions like square roots, logarithms, and trigonometric operations. Graphing calculators can plot equations and display visual graphs, which can be helpful for certain algebra and precalculus problems.
Popular models like the Texas Instruments TI-83 Plus and TI-84 Plus are permitted because they lack prohibited features. These calculators are commonly used in high school math classes and are well-suited for ACT problems. However, versions with a computer algebra system (CAS), such as the TI-89 or TI-Nspire CAS, are not allowed. CAS calculators can solve equations symbolically, which violates ACT rules.
The ACT does not publish a list of approved models. Instead, it provides functional guidelines. Students should evaluate their calculator based on what it can do, not just the brand or name. More information is available at ACT.org.
Prohibited Features
Certain features make a calculator ineligible, regardless of brand. Devices with QWERTY keyboards—like the TI-92—are banned because they make it easier to type and store text. Calculators with wireless capabilities such as Bluetooth, infrared, or cellular functions are also prohibited, even if those features are turned off. This includes smartwatches or any device that can connect to another system.
Other disallowed features include:
- Built-in algebra systems (CAS)
- Paper tape printers
- Noise-making components (like alarms or beeps)
- Stylus-based input (e.g., older handheld PDAs)
Calculators requiring external power sources, such as a solar panel with a cord, may be rejected. Test center staff have final authority and can disallow any device that appears questionable. If unsure, bring a simpler backup model.
Example of an Approved Calculator
The Casio fx-9750GII is a common choice among students. It supports graphing, statistical calculations, and equation solving, but does not have a CAS. This makes it compliant with ACT rules. It’s also affordable and user-friendly, with a menu layout that is easier to navigate than some high-end models. Students who practice with this calculator often find it efficient for solving problems involving functions, inequalities, and data analysis.
However, not all versions of a model are the same. Some variants may include added features that violate ACT policies. Always check the exact model number and confirm it does not include prohibited capabilities.
Calculator Use During the ACT
Only the Math section allows calculator use, and it is optional. While not required, a calculator can help solve problems faster and reduce errors, especially on questions involving exponents, roots, or trigonometric values. For example, a question asking for the value of cos(60°) can be answered quickly using a scientific calculator, which returns 0.5. Without one, students must rely on memorized values or estimation.
Some problems are designed to be solved more efficiently without a calculator. Overusing the device can waste time, especially if a student is not familiar with its functions. The goal is to use it strategically—not for every calculation.
Students should practice with their calculator before test day. Knowing how to enter fractions, use parentheses correctly, and access trigonometric functions quickly improves accuracy and speed. The ACT does not penalize for not using a calculator, but using one inefficiently can hurt performance.
Preparing Your Calculator for Test Day
Familiarity matters. Use the same calculator during practice tests that you plan to use on exam day. Learn how to navigate menus, adjust settings, and perform common operations without hesitation.
Before the test, remove any covers or stickers that might hide features or look suspicious. If your calculator has a mode that simulates CAS or other advanced functions, make sure it is disabled. Proctors may disallow the device even if the feature is inactive.
Check the battery. Graphing calculators often use AAA batteries or rechargeable packs. Replace old batteries or fully charge the device before test day. Rechargeable models cannot be charged at the testing center. Consider bringing a backup calculator, especially if your primary device is older or complex.
You may bring only one calculator to your seat, but you can store a second one in your bag. If your main calculator fails, you may quietly retrieve the backup. Sharing or switching calculators during the test is not allowed.
Key Takeaways
- The ACT allows basic, scientific, and graphing calculators without prohibited features.
- Devices with QWERTY keyboards, CAS, wireless functions, noise-making parts, or external power cords are not permitted.
- Popular models like the TI-84 Plus and Casio fx-9750GII are generally allowed, but verify the exact version.
- Only the Math section allows calculator use; it is optional but can save time on complex problems.
- Practice with your calculator beforehand and bring a backup on test day.
- For official rules, visit ACT.org.
