Can You Use a Calculator for the ACT? Interactive Checker & Policy Guide

Determine if your calculator is permitted on the ACT Math test with this simple tool and detailed guide.

ACT Calculator Permissibility Checker

What is the ACT Calculator Policy?

The official ACT calculator policy is designed to ensure fairness and test security for all students. While you can solve every question on the ACT Math test without a calculator, using an approved one can save you valuable time and help prevent simple arithmetic errors. You are allowed to use a calculator **only on the Mathematics test**, not on any other section, including the Science test.

Generally, any four-function, scientific, or graphing calculator is permitted as long as it is not on the specific list of prohibited models and doesn’t have banned features. The most common reason for a calculator to be prohibited is the inclusion of a Computer Algebra System (CAS).

ACT Calculator “Formula” and Explanation

There isn’t a mathematical formula to determine if a calculator is allowed, but rather a set of logical rules. The “calculation” is a check against a list of prohibited characteristics. Our calculator above automates this logic for you. Here are the key variables it considers:

Key factors determining calculator eligibility on the ACT.

Variable / Feature	Meaning	Unit	Status if Present
Computer Algebra System (CAS)	Ability to solve algebraic equations symbolically.	Functionality	Prohibited
QWERTY Keyboard	A typewriter-style keyboard layout.	Hardware	Prohibited
Communication Device	Phones, tablets, smartwatches, laptops.	Device Type	Prohibited
Infrared Data Port	Allows wireless communication between calculators. Must be covered with opaque tape.	Hardware	Modification Required
Makes Noise	Any audible sounds must be muted.	Feature	Modification Required

Practical Examples

Example 1: Texas Instruments TI-84 Plus

A student has a standard TI-84 Plus CE, one of the most common calculators in high school.

• Inputs: Calculator Type = Graphing, Has CAS? = No, Has QWERTY? = No, Is it a device? = No.
• Result: PERMITTED. The TI-84 Plus series is explicitly allowed as it does not have a CAS.

Example 2: A Smartphone Calculator App

A student forgets their calculator and wants to use the app on their iPhone.

• Inputs: Calculator Type = Other, Is it a device? = Yes.
• Result: PROHIBITED. All cell phones and other communication devices are strictly banned from use as calculators during the test.

How to Use This “Can You Use a Calculator for the ACT” Calculator

Our tool simplifies the official ACT rules. Here’s how to use it effectively:

1. Select Calculator Type: Choose the best description for your calculator from the dropdown menu.
2. Check for Prohibited Features: Carefully review the checkboxes. If your calculator has a CAS (like a TI-89 or TI-Nspire CAS), a QWERTY keyboard, or is a smart device, check the corresponding box.
3. Check Permissibility: Click the “Check My Calculator” button.
4. Interpret the Results: The tool will provide a clear “PERMITTED” or “PROHIBITED” status, along with an explanation of why that decision was reached based on your inputs.

Key Factors That Affect if You Can Use a Calculator for the ACT

Navigating the official ACT calculator policy involves several key factors:

1. Computer Algebra System (CAS): This is the most critical rule. Calculators that can symbolically solve equations (e.g., factor, expand) are banned because they undermine what the test is designed to measure.
2. Prohibited Models List: The ACT explicitly lists certain models as prohibited. This includes all TI-89 and TI-92 models, the TI-Nspire CAS, and various HP Prime and Casio models.
3. Device Type: No laptops, mobile phones, tablets, or any device with communication capabilities are allowed.
4. Keyboard Style: Calculators with a QWERTY keyboard are not permitted.
5. Required Modifications: Some calculators are allowed only if modified. For example, if your calculator has an infrared port, you must cover it with opaque tape. If it makes noise, it must be muted.
6. Test Section: Remember, calculators are only for the Math section. Using one on the Science or other sections is a violation of the rules.

For more details on test preparation, see our guide to the ACT Prep Course.

Frequently Asked Questions (FAQ)

What calculators are banned on the ACT?

The main banned calculators are those with a Computer Algebra System (CAS). This includes the Texas Instruments TI-89, TI-92, and TI-Nspire CAS models, as well as the HP Prime and several Casio ClassPad models.

Can I use a TI-84 on the ACT?

Yes, all versions of the TI-84 (including the Plus and CE models) are permitted on the ACT because they do not have a built-in CAS. It is a highly recommended calculator for the ACT.

Is the TI-Nspire CAS allowed?

No, the TI-Nspire with “CAS” in its name is explicitly prohibited. However, the standard TI-Nspire (non-CAS) model is permitted.

Do I need a calculator for the ACT Science section?

No, you are not allowed to use a calculator on the ACT Science section. Calculators are only permitted during the Math test. For strategies on these sections, you might want to compare the SAT vs ACT.

What happens if I bring a prohibited calculator?

The testing staff will check your calculator. If it’s a prohibited model, you won’t be allowed to use it. In a worst-case scenario, being found using a prohibited device during the test could lead to your dismissal and the voiding of your scores.

Can I share my calculator with another student?

No, sharing calculators is not permitted during the test.

Does the ACT provide a calculator?

You are responsible for bringing your own calculator. Testing centers do not provide them. For the computer-based test, an on-screen calculator may be available.

Do I have to clear the memory on my graphing calculator?

While the ACT policy states you must remove any programs with CAS functionality, proctors may check and require you to clear your calculator’s RAM. It’s best to back up anything important and know how to clear your programs and memory before test day.