SAT/sphere SAT Blog
Mastering the New Digital SAT Calculator Policies: CAS Bans, Desmos, and Strategy
Navigating the 2025 updates to ensure your device is approved for test day success.
The Digital SAT transition introduces significant changes to calculator use, including a ban on CAS-enabled devices and the integration of the Desmos graphing tool. This guide breaks down the College Board's updated regulations, helping you distinguish between permitted and prohibited models while providing actionable strategies to maximize your efficiency during the Math section.
July 14, 2025
July 14, 2025
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When does the College Board ban CAS calculators from the Digital SAT?
These answers cover the main questions connected to this SAT topic, so you can review the key points quickly. They also give you a faster way to revisit the practical takeaways without rereading the full article.
CAS (Computer Algebra System) calculators are banned starting August 2025. This includes models such as the TI-89, HP Prime, and Casio ClassPad series. These devices can symbolically solve equations, perform algebraic simplification, and compute integrals or derivatives automatically, which gives students an unfair advantage over those relying on manual computation.
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The Digital SAT includes a full-featured Desmos graphing calculator embedded directly within the Bluebook testing app. This tool provides plotting, regression, sliders, table view, and basic statistical analysis features. Because it is identical for every test-taker, it ensures equal access to advanced graphing capabilities without requiring students to purchase or master proprietary devices.
Yes, calculator use is now permitted during every math question on the Digital SAT. Unlike previous SAT formats where calculators were restricted to specific portions, students can choose to use their calculator or rely on manual computation on a question-by-question basis, mirroring real-world scenarios where professionals use tools as needed.
Bringing an unapproved calculator risks test score cancellation. The College Board requires students to use only permitted devices, and any calculator with CAS functionality, QWERTY keyboards, internet access, or app storage capabilities is strictly disallowed. If you are unsure whether your device is permitted, rely on the built-in Desmos tool instead.
To master Desmos, familiarize yourself with the interface by learning how to enter equations, adjust window settings, and switch between expression lists and tables. Practice common tasks such as graphing functions with sliders to see how coefficients affect shapes, and use regression features to model data. Incorporate Desmos drills into your weekly study schedule alongside manual pencil-and-paper practice.
Develop the judgment to decide whether to compute manually or use your calculator for each question. Strengthen mental math skills for basic operations to avoid reaching for your device unnecessarily. Practice under timed conditions using Bluebook and Desmos to build comfort with the digital interface and improve your speed navigating menus and inputting equations.
