Can You Use a Calculator for the ACT?
A complete guide to the official ACT calculator policy, with a tool to check if your model is permitted.
ACT Calculator Policy Checker
General Calculator Type Allowance on the ACT
What is the ACT Calculator Policy?
The question of “can you use a calculator for the ACT” is a critical one for many test-takers. The simple answer is yes, you can, but only on the Mathematics section of the test. However, the ACT has a detailed policy to ensure fairness and test security. While most 4-function, scientific, and graphing calculators are permitted, some specific models and types with advanced functionality are strictly prohibited. It’s important to know that all math problems on the ACT can be solved without a calculator, but using a familiar and permitted device can significantly help with speed and accuracy.
The policy is designed to prevent any student from having an unfair advantage. This means banning calculators that can perform complex algebraic manipulations, communicate with other devices, or make noise. Understanding these rules is your responsibility before test day.
ACT Calculator Rules and Prohibitions
The core of the ACT’s policy revolves around banning calculators with a **Computer Algebra System (CAS)**. A CAS can solve algebraic equations symbolically, which goes beyond the numerical calculations the ACT intends to test. Other prohibited features include QWERTY keyboards, wireless communication, and the need for external power cords.
Prohibited Calculators and Features Table
| Prohibited Feature or Model Series | Meaning & Explanation | Common Examples |
|---|---|---|
| Computer Algebra System (CAS) | The calculator can perform symbolic algebra (e.g., factor, solve for x). This is the most common reason for a calculator to be banned. | TI-Nspire CAS, HP Prime, All TI-89 and TI-92 models |
| QWERTY Keyboard | Calculators with a keyboard layout like a computer are not allowed as they can be used for text. | Devices with text-entry capabilities. |
| Communication Devices | Any device that can connect to the internet, or communicate via infrared, Bluetooth, or other wireless methods is banned. | Cell phones, tablets, smartwatches. |
| Requires External Power | Calculators that need to be plugged into an electrical outlet are not permitted. | Laptops or calculators with power cords. |
| Makes Noise or Prints | Devices that make audible sounds or print to a paper tape must have these features disabled or the materials removed. | Printing calculators (remove tape), calculators with sound (must be muted). |
Practical Examples
Example 1: A Permitted Calculator
- Student’s Calculator: Texas Instruments TI-84 Plus CE
- Analysis: The TI-84 Plus CE is a graphing calculator, which is allowed. It does not have a built-in Computer Algebra System (CAS). It doesn’t have a QWERTY keyboard. Therefore, it is a very popular and permitted choice. You can find more details in our guide to the Best Graphing Calculators for Standardized Tests.
- Result: ✅ Allowed
Example 2: A Prohibited Calculator
- Student’s Calculator: Texas Instruments TI-89 Titanium
- Analysis: The “TI-89” model number is explicitly listed as prohibited by the ACT. The reason is that this calculator contains a powerful Computer Algebra System (CAS), giving a test-taker an unfair advantage by solving algebraic expressions automatically.
- Result: ❌ Prohibited
How to Use This ACT Calculator Checker
Using the calculator on this page is simple and designed to give you a quick answer to “can you use calculator for act” based on your specific model. Follow these steps:
- Find Your Calculator’s Model Name: Look at the top of your calculator. The model is usually printed clearly (e.g., “TI-30XS”, “HP 50g”).
- Enter the Model Name: Type the full model name into the input field above.
- Check the Results: Click the “Check My Calculator” button. The tool will analyze the name for keywords associated with prohibited models (like “CAS”, “TI-89”, “HP Prime”).
- Review the Explanation: The result will show “Allowed” or “Prohibited” along with a brief explanation of why, helping you understand the specific rule that applies. For further reading, see our SAT Calculator Policy Guide for a comparison.
Key Factors That Affect if a Calculator is Permitted
When determining if your calculator is allowed, the ACT focuses on several key factors:
- CAS Functionality: This is the number one issue. If your calculator model includes “CAS” in its name, it’s almost certainly banned.
- Model Series: Certain entire series are banned. This includes all calculators starting with TI-89 or TI-92, and many HP models like the HP 48GII, HP 49G, and HP 50G.
- Keyboard Layout: A QWERTY keyboard is an automatic disqualification.
- Communication Ability: Any form of wireless or wired communication capability is strictly forbidden. This is why phones and smartwatches are not allowed.
- Physical Modifications: Some calculators are allowed only with modifications. For instance, if it has an infrared port, it must be covered with opaque tape. If it makes noise, the sound must be off.
- Power Source: The calculator must be battery-powered. Those requiring an external power cord are not allowed.
For a detailed breakdown of test day procedures, check our Test Day Checklist: What to Bring.
Frequently Asked Questions (FAQ)
1. Is the TI-84 Plus allowed on the ACT?
Yes, all versions of the TI-84 Plus family (including the Plus, Plus C Silver Edition, and Plus CE) are allowed on the ACT as they do not have a CAS.
2. Can you use a TI-Nspire on the ACT?
It depends. The standard TI-Nspire (non-CAS) is permitted. However, the TI-Nspire CAS is explicitly prohibited. You must check the top of your calculator to see if the letters “CAS” are present.
3. What happens if I bring a banned calculator?
Testing staff are responsible for monitoring calculator use. If you are found with a prohibited calculator, you may be dismissed from the test, and your scores will be voided.
4. Do I need to clear my calculator’s memory?
The ACT requires that you remove any programs that have CAS functionality. While proctors don’t always inspect calculators, it is your responsibility to ensure it complies. It’s a good practice to clear both memory and any non-compliant programs before the test.
5. Are calculator apps on phones or tablets allowed?
No. All phones, tablets, and smartwatches are strictly prohibited from use during the test.
6. Can I share a calculator with another student?
No. Sharing calculators is not permitted under any circumstances. It is recommended to bring a backup calculator and extra batteries. A solid understanding of your score can be found on our Understanding Your ACT Score Report page.
7. Is there a difference between the ACT and SAT calculator policies?
Yes, there are minor differences, though both ban CAS calculators for most sections. The SAT has a calculator and a no-calculator math section, while the entire ACT Math test permits a calculator. Always check the specific policy for each test.
8. Where can I find the official ACT policy?
The most current and official policy is always available on the ACT’s official website (act.org). It’s wise to check it close to your test date for any updates. If you need more help, review our ACT Math Section Strategy.
Related Tools and Internal Resources
Explore these resources for more help preparing for your standardized tests.
- SAT Calculator Policy Guide – Understand the differences between the ACT and SAT calculator rules.
- Best Graphing Calculators for Standardized Tests – A review of top permitted calculators.
- ACT Math Section Strategy – Tips and tricks to improve your score on the ACT Math test.
- Free ACT Practice Questions – Sharpen your skills with practice problems.
- Understanding Your ACT Score Report – Learn how to interpret your results.
- Test Day Checklist: What to Bring – Make sure you’re prepared for everything on test day.