SAT Calculator Policy Checker

A tool to determine if your calculator is allowed on the SAT and a guide to the question: can you use 2 calculators on the SAT?

Is Your Calculator SAT-Approved?

Check the features of your calculator below to see if it meets the College Board’s official policy.

Prohibited Features Checklist:

Select any feature your calculator has.

Answering the Core Question: Can You Use 2 Calculators on the SAT?

The question “can you use 2 calculators on the sat” is a common one for students preparing for the exam. The short answer is nuanced: **You are allowed to bring a second, backup calculator to the test center, but you can only have one calculator on your desk at a time.** If your primary calculator malfunctions, you must get permission from the proctor to swap it with your backup. You cannot actively use two calculators by switching back and forth between them.

Since the introduction of the Digital SAT, all students also have access to a built-in graphing calculator (Desmos) within the testing application, Bluebook. This means every student has access to a powerful tool, regardless of what they bring. However, bringing a physical calculator you are familiar with is highly recommended.

SAT Calculator Policy Formula and Explanation

There isn’t a mathematical formula, but a logical one for determining if a calculator is allowed. The core principle is that the device must be a dedicated calculator and cannot provide an unfair advantage through communication, external data, or advanced symbolic manipulation.

The “formula” for compliance can be expressed as:

Allowed = NOT (Has CAS OR Has QWERTY OR Has Wireless OR Needs Outlet OR …)

This means if your calculator has any of the officially prohibited features, it is not allowed.

Key Variables in Calculator Approval

This table outlines the critical factors determining a calculator’s eligibility.

Variable (Feature)	Meaning	Unit (Status)	Typical Range (Value)
CAS (Computer Algebra System)	The ability to manipulate algebraic expressions symbolically.	Boolean (Prohibited)	Must be ‘False’. Calculators with ‘CAS’ in the name are not allowed.
Wireless Capability	Features like Wi-Fi, Bluetooth, or cellular access.	Boolean (Prohibited)	Must be ‘False’. No internet-capable devices are permitted.
QWERTY Keyboard	A typewriter-style keyboard.	Boolean (Prohibited)	Must be ‘False’. This is strictly forbidden.
Power Source	How the calculator is powered.	Categorical (Battery-Only)	Must be battery-operated. Devices needing an outlet are not allowed.
Input Method	How you interact with the calculator.	Categorical (Keypad)	Must use a keypad. Stylus or pen-input devices are not allowed.

Practical Examples of Using the Policy

Example 1: The Compliant Student

• Input (Calculator): TI-84 Plus CE.
• Unit Analysis: This is a graphing calculator. A quick check shows it does NOT have a CAS, a QWERTY keyboard, or wireless capabilities. It is battery-operated.
• Result: This calculator is **Allowed**.

Example 2: The Non-Compliant Student

• Input (Calculator): TI-Nspire CX II-T CAS.
• Unit Analysis: This calculator explicitly has “CAS” in its name. This feature allows it to solve equations symbolically, which is a prohibited function.
• Result: This calculator is **Not Allowed**.

How to Use This SAT Calculator Compliance Checker

1. Identify Features: Look at your calculator and honestly identify its features. Does it have Wi-Fi? Does the keyboard look like a computer’s?
2. Check the Boxes: In the calculator above, check the box for each prohibited feature your device has.
3. Review the Result: The tool will instantly tell you if your calculator is likely allowed or not allowed based on the official rules.
4. Read the Explanation: The output will explain exactly which rule your calculator violates.

Key Factors That Affect SAT Calculator Policy

• Fairness: The core goal is to ensure no student has an unfair advantage. This is why communication and CAS features are banned.
• Test Security: Prohibiting devices with cameras, internet, or large storage prevents cheating and the leaking of test content.
• Technological Advances: The College Board regularly reviews its policy to keep up with new device capabilities.
• Digital SAT Transition: The inclusion of the Desmos calculator in the Bluebook app provides a baseline for all students, influencing the policy for external devices.
• Calculator vs. Computer: The rules draw a firm line between a calculation device and a miniature computer. Laptops, tablets, and phones are strictly forbidden.
• Familiarity: While rules are strict, the policy still allows a wide range of scientific and graphing calculators, encouraging students to use a device they already know. For more information, check out these approved SAT calculators.

Frequently Asked Questions (FAQ)

1. So, can I have a TI-84 and a scientific calculator on my desk?

No. You can only have one calculator on your desk at a time. The other must be stored under your chair and can only be accessed with the proctor’s permission if the first one fails.

2. Is the TI-84 Plus CE allowed on the SAT?

Yes, the TI-84 Plus CE is one of the most popular and widely approved graphing calculators for the SAT. Learn more about the SAT calculator policy.

3. What happens if I bring a prohibited 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.

4. Do I need to clear the memory on my calculator?

Yes, you must remove any stored programs or documents that have algebra functionality, like equation solvers. It’s best practice to clear the memory before test day.

5. Is a four-function calculator enough?

While technically allowed, a four-function calculator is not recommended. The SAT math section involves complex problems where a scientific or graphing calculator offers a significant advantage in speed and capability. Consider these SAT math section tips to improve your score.

6. What if my calculator’s batteries die?

This is the primary reason for bringing a backup calculator. You would need to raise your hand and get the proctor’s permission to switch to your backup. Always put fresh batteries in your primary calculator before the test.

7. Can I use the calculator on the Reading and Writing section?

No. Calculator use is strictly prohibited during the Reading and Writing section. You must put it away.

8. What is the difference between a CAS and a non-CAS calculator?

A CAS (Computer Algebra System) calculator can perform symbolic manipulation (like factoring `x^2-1` into `(x-1)(x+1)`). A non-CAS calculator can only compute with numbers (e.g., finding the value of `sqrt(9)`). Only non-CAS calculators are allowed. To learn more, see this guide on what calculators are allowed on the SAT.