SAT Calculator Policy Guide

The College Board has specific rules about what calculators you can use on the SAT. Using a prohibited device can lead to dismissal. Enter your calculator’s model number below to check if it’s likely to be allowed.

What is the SAT Calculator Policy?

The SAT calculator policy is a set of rules established by the College Board to ensure fairness and test security for every student. The policy dictates which calculators are permitted and which are forbidden during the math portion of the SAT. While for the digital SAT, a built-in graphing calculator (Desmos) is provided, you are still allowed to bring your own approved device. Knowing what calculators you can use on the SAT is critical to avoid issues on test day.

SAT Calculator Rules Explained

The policy isn’t just a list of models; it’s based on features. Understanding these rules is the best way to determine if your device is compliant.

Permitted Calculators

• Graphing Calculators: Most graphing calculators are permitted, provided they do not have any of the prohibited features listed below. This is the most common type of calculator students bring.
• Scientific Calculators: All standard scientific calculators are acceptable. These are powerful enough for most SAT questions.
• Four-Function Calculators: While allowed, these are not recommended as they are very basic and may not be sufficient for more complex problems.

Prohibited Features & Devices

• Computer Algebra System (CAS): This is the most important rule. Calculators with CAS functionality, which can perform symbolic algebra (like factoring or solving equations symbolically), are strictly prohibited.
• QWERTY Keyboards: Any device with a computer-style keyboard is not allowed.
• Wireless Communication: Calculators with Wi-Fi, Bluetooth, or any internet access are banned.
• Power Cords: Calculators must be battery-operated. You cannot use one that needs to be plugged into an outlet.
• Stylus/Pen-Input: Devices that use a stylus or pen are not allowed (e.g., Casio ClassPad series).
• Noise: Devices that make noise are prohibited. You must turn off any sound features.
• Other Devices: Laptops, mobile phones, tablets, and smartwatches are never allowed to be used as a calculator.

Practical Examples

Understanding the rules with real-world examples can clarify what calculators you can use on the SAT.

Example 1 (Allowed): A student has a TI-84 Plus CE. This calculator is checked and found to be ALLOWED because it is a standard graphing calculator and, crucially, does not have a CAS. It is one of the most popular choices for the SAT.

Example 2 (Prohibited): A student has a TI-Nspire CX II CAS. This calculator is checked and found to be NOT ALLOWED. Even though the non-CAS version is permitted, the “CAS” in the name signifies it has a Computer Algebra System, which is explicitly banned by the College Board.

How to Use This SAT Calculator Checker

1. Enter Model Name: Type the full model name of your calculator into the input field above. Be as precise as possible.
2. Check Status: Click the “Check My Calculator” button.
3. Review Results: The tool will provide one of three results:
   • Allowed: Your calculator does not appear on the official prohibited list and doesn’t contain terms associated with banned features.
   • Not Allowed: Your calculator model is either on the College Board’s explicit list of prohibited devices or contains a feature (like CAS) that is banned.
   • Check Manually: The model is not in our database. You must manually check it against the key factors listed below and consult the official College Board website.

Key Factors That Affect Calculator Eligibility

When determining what calculators you can use on the SAT, the College Board focuses on these six key features:

Summary of SAT Calculator Eligibility Factors

Factor	Meaning	Impact on Eligibility	Typical Range / Value
Computer Algebra System (CAS)	Ability to manipulate symbolic equations (e.g., solve for x).	Prohibited	Models with “CAS” in the name (e.g., TI-89, HP Prime).
QWERTY Keyboard	A full, typewriter-style keyboard.	Prohibited	N/A (Any such device is banned).
Wireless Capability	Internet, Bluetooth, or Infrared access.	Prohibited	N/A (Any such device is banned).
Stylus or Pen Input	Touchscreen is operated with a stylus.	Prohibited	Models like Casio ClassPad.
Power Source	How the calculator is powered.	Must be battery-operated. No power cords.	AA, AAA, or rechargeable battery.
External Devices	Peripherals like printers or memory cards.	Prohibited	Calculators with paper tape are banned.

Frequently Asked Questions (FAQ)

1. What does CAS mean and why is it banned?

CAS stands for Computer Algebra System. It allows a calculator to perform algebraic manipulations, like solving ‘x + 2 = 4’ to find ‘x = 2’. The College Board prohibits this to ensure students are tested on their own mathematical skills, not the calculator’s.

2. Is the TI-Nspire allowed on the SAT?

This is a common point of confusion. The TI-Nspire CX and TI-Nspire CX II are ALLOWED. However, the TI-Nspire CAS and TI-Nspire CX II CAS are NOT ALLOWED. You must check if “CAS” is part of the model name.

3. What if my calculator is not on any official list?

If your calculator isn’t on a prohibited list, check it against the feature rules. Does it have CAS, a QWERTY keyboard, or wireless access? If not, it is likely allowed. When in doubt, have a backup approved calculator ready.

4. Do I have to clear my calculator’s memory?

The College Board requires you to remove any stored documents. While proctors may not always inspect memory, it’s a rule, and you should clear any stored programs or notes to be safe.

5. Can I use my phone’s calculator app?

No. Mobile phones, tablets, and smartwatches are strictly prohibited from being used as calculators during the test.

6. Can I share my calculator with a friend during the test?

No, sharing calculators is not permitted under any circumstances. Each student must have their own device.

7. What happens if I bring a banned calculator?

You will not be allowed to use it. If you are caught using a prohibited device during the test, you will be dismissed, and your scores will be canceled.

8. Are all scientific calculators allowed?

Yes, all standard scientific calculators are permitted on the SAT. They do not have the advanced prohibited features found in some graphing calculators.