Mastering Your Calculator for the SAT: What You Need to Know in 2025

Mastering Your Calculator for the SAT

Calculators are one of the most important tools available to students during the SAT Math section. In the era of the digital SAT, understanding how to use your calculator effectively—and making sure it complies with current rules—is more important than ever. With the College Board's updated calculator policy taking effect in August 2025, students must stay informed to avoid common mistakes that could affect their test performance or, worse, result in canceled scores.

This article outlines everything you need to know about SAT calculator rules, types of approved calculators, and strategic tips for maximizing your calculator use.

The Digital SAT and Calculator Access

If you're sitting for the SAT in 2025, you’ll be taking the Digital SAT. One key advantage of the digital format is that it includes a built-in Desmos graphing calculator within the Bluebook testing application. This powerful tool is available for every student during the Math section, even if they don’t bring their own device.

The embedded calculator mimics the online version found at desmos.com/calculator. Familiarity with Desmos can give you a major edge on test day, especially if you're not bringing a physical calculator. That’s why it’s a good idea to complete practice tests using the same digital tools you’ll have access to during the real exam.

Can You Bring Your Own Calculator?

Yes. Students are still allowed to bring their own handheld calculator—so long as it meets specific guidelines set by the College Board. These guidelines are designed to ensure fairness and prevent any technological advantages or potential cheating.

General Guidelines:

• Only non-CAS (Computer Algebra System) calculators are allowed.

• Graphing, scientific, and four-function calculators are permitted—provided they don’t contain prohibited features.

• You can’t share your calculator with other test takers.

• You must turn off all sounds and cover infrared ports with tape if applicable.

• No charging allowed. Your calculator must be battery-operated and ready to go on test day.
  

May 2025 Policy Update: CAS Calculators Banned

Effective August 2025, calculators with CAS functionality are no longer allowed during any assessment within the SAT Suite of Assessments. CAS (Computer Algebra System) calculators can symbolically manipulate algebraic expressions—like factoring, solving equations, and expanding expressions—giving users an unfair advantage.

Examples of CAS Calculators That Are Now Banned:

• Texas Instruments: TI-Nspire CX II CAS, TI-89 series, TI-92 series.

• Casio: ClassPad fx-CG500, Algebra fx 2.0, CFX-9970G.

• Hewlett Packard: HP Prime, HP 49G, 50G, and others.

Even if you’re using a familiar calculator, double-check the model number before test day to ensure it complies with the updated policy.

Acceptable Calculators

Let’s take a closer look at what calculators you can bring:

1. Desmos Graphing Calculator (Embedded in Bluebook)

This is the default option for all students. It includes features like graph plotting, table creation, and function analysis.

2. Graphing Calculators (Non-CAS)

These include most models from brands like Texas Instruments (e.g., TI-84 Plus), Casio (fx-9860GII), and HP that do not support CAS functionality.

3. Scientific Calculators

Good for students who want a simpler, focused tool. These offer trig functions, memory storage, and statistical functions.

4. Four-Function Calculators

Permitted but not recommended. These only handle basic operations and often lack the order of operations functionality, which can lead to calculation errors.

Prohibited Devices and Features

In addition to CAS calculators, several other devices are explicitly banned:

• Calculators with QWERTY keyboards

• Devices with Bluetooth, Wi-Fi, or cellular connectivity

• Smartphones, tablets, and laptops

• Devices with built-in cameras or microphones

• Paper-tape calculators or calculators that print

• Electronic writing pads or styluses

Attempting to use these devices can lead to immediate dismissal and score cancellation.

Strategic Calculator Use: Tips for SAT Success

Even with a powerful calculator at your fingertips, success in the Math section isn’t guaranteed. How and when you use your calculator matters.

1. Know Your Calculator Before Test Day

Whether you're using Desmos or your own handheld device, don’t wait until test day to familiarize yourself with its features. Practice regularly using the calculator you intend to use during the SAT. Know how to:

• Enter fractions and decimals

• Graph equations

• Use the memory function

• Access trig or log functions (if applicable)
  

2. Don’t Use It for Every Question

It’s tempting to use your calculator for every problem, but sometimes mental math or basic pencil-and-paper calculation is faster and more efficient. Know when it’s better to work manually to save time.

3. Use Scratch Paper Wisely

Jotting down calculations or setting up a problem visually can help you avoid simple mistakes. Use the scratch paper provided to organize your work before jumping into calculator input.

4. Test Your Calculator’s Batteries

This seems obvious, but it’s one of the most overlooked SAT preparation steps. Bring a fresh set of batteries and, if possible, a backup calculator that also meets College Board guidelines.

5. Avoid Risky Features

If your calculator has apps or menus for symbolic algebra manipulation, remove or disable them before test day. You don’t want to be flagged for using restricted functionality.

Why This Matters

SAT rules exist to create a level playing field for all students. Using a prohibited calculator or accessing it during the Reading and Writing section can result in your scores being voided. Follow the guidelines carefully to make sure your hard work isn’t wasted.

With updated policies rolling out and digital testing becoming the standard, preparing wisely is more important than ever. As you design your study plan, make sure calculator use becomes part of your routine.

Final Thoughts

When it comes to sat course preparation, mastering your calculator is just one piece of the puzzle. Understanding how to use this tool effectively—while staying compliant with the rules—can make a real difference on test day. Whether you rely on the built-in Desmos calculator or bring your own approved device, preparation is key.

With the right approach, your calculator can enhance your performance, not hinder it. So take time now to prepare smartly and make sure you're equipped for success on your SAT journey.