Can You Use a Calculator on the ACT Math Test?

An interactive tool and guide to the official ACT® calculator policy.

ACT Calculator Permissibility Checker

Check the features of your calculator below to see if it’s likely permitted on the ACT Math test. According to the official policy, some features will disqualify a calculator.

Check the boxes above to see your calculator’s status.

What is the official policy on whether you can use a calculator on the ACT math test?

Yes, you can and should use a calculator on the ACT Math test. However, the ACT has a strict policy to ensure fairness and test security. While every problem on the test can be solved without a calculator, using an approved device strategically can save you valuable time. You are responsible for bringing your own battery-powered, permitted calculator. Proctors will check them, and using a prohibited device can lead to dismissal.

Prohibited vs. Permitted: The “Formula” for a Legal Calculator

The “formula” for determining if a calculator is allowed is a process of elimination. A calculator is permitted only if it does NOT have any of the features on the prohibited list.

Permitted Status = NOT (Has CAS OR Has QWERTY OR Is a Phone OR Needs Outlet OR Has Wireless)

Calculator Feature Compliance Rules

Variable (Feature)	Meaning	Permitted?	Typical Range/Example
Standard Functionality	4-function or scientific calculator	Yes	TI-30X, most basic calculators
Graphing (Non-CAS)	Graphing calculator without a Computer Algebra System	Yes	TI-83, TI-84 Plus series
CAS (Computer Algebra System)	Ability to solve algebra symbolically	No	TI-89, TI-Nspire CAS
QWERTY Keyboard	Typewriter-style letter keys	No	TI-92 Plus
Communication Device	Phone, tablet, smartwatch, etc.	No	Any iPhone or Android device

Practical Examples

Let’s see how the policy applies in practice:

• Example 1: A student has a TI-84 Plus CE. They use the checker and don’t select any prohibited features. The result is Permitted. This is a standard and highly recommended calculator for the ACT.
• Example 2: A student has a TI-89 Titanium. They check the box for “Has a Computer Algebra System (CAS)”. The result is immediately Not Permitted because CAS calculators are explicitly banned.

How to Use This “Can You Use Calculator on ACT Math” Checker

1. Review Your Calculator: Look at your physical calculator and identify its features.
2. Check the Boxes: For each feature your calculator has that matches a description in the checker, click the checkbox.
3. Interpret the Result: The result box will instantly update. A green “Permitted” means you are likely safe. A red “Not Permitted” means you must get a different calculator for the test. The explanation will tell you exactly which rule you violated.

Key Factors That Affect Your Calculator Choice

Choosing the right calculator involves more than just picking a permitted one. Consider these factors:

• Familiarity: The best calculator is the one you know how to use well. Don’t switch to a new, complicated calculator right before the test.
• Battery Life: Ensure your calculator has fresh batteries or is fully charged. Bringing a backup is a smart idea.
• No-Calculator Problems: Remember that many problems are faster to solve by hand. Don’t rely on the calculator as a crutch.
• Graphing Functions: A graphing calculator can be a powerful tool for visualizing problems, checking solutions, and using the table function to test values.
• CAS vs. Scientific: A Computer Algebra System (CAS) can solve `x + 5 = 10` for `x`. A scientific calculator cannot. This powerful feature is why CAS is banned.
• Digital Test Option: If you take the digital ACT, an on-screen Desmos graphing calculator will be available, but you can still bring your own approved handheld one.

Frequently Asked Questions (FAQ)

Can I use a TI-89 on the ACT?

No. All calculators in the TI-89 and TI-92 series are banned because they have a built-in Computer Algebra System (CAS).

Is the TI-Nspire allowed?

It depends. The standard TI-Nspire (non-CAS) is permitted. However, the TI-Nspire CAS is explicitly prohibited.

What if my calculator has programs or games on it?

ACT policy forbids programs on your calculator. While proctors may not check every calculator, it’s a risk. You should clear your calculator’s memory before the test to be safe.

What should I do if my calculator’s batteries die during the test?

You are responsible for your own equipment. Test staff will not provide batteries or a replacement. This is why bringing a backup calculator or at least extra batteries is highly recommended.

Can I share a calculator with a friend?

No. Sharing calculators during the test is not permitted under any circumstances.

Are calculators allowed on the ACT Science section?

No. Calculators are only allowed on the Mathematics test. They are prohibited on the Reading, English, and Science sections.

How do I know if my calculator is in the right mode (degrees vs. radians)?

You must ensure your calculator is in Degree mode for most ACT trigonometry problems. You can usually find this setting under a “Mode” button. Check your calculator’s manual for specific instructions.

Do I really need a graphing calculator?

While not strictly required, a graphing calculator can offer a significant advantage for visualizing graphs of functions, solving systems of equations graphically, and analyzing data. However, a scientific calculator you are proficient with is better than a graphing calculator you don’t know how to use.