Can you bring a calculator to the SAT?

Yes. The Digital SAT includes a built-in Desmos graphing calculator you can use on every math question, and you can also bring an approved physical calculator as a backup.

The built-in Desmos calculator

The Digital SAT includes a full Desmos graphing calculator inside Bluebook. It is available on every math question, and it is genuinely powerful — most 1500+ students rely on Desmos to speed through algebra and graphing questions.

Approved physical calculators

You can also bring your own calculator as backup. Approved calculators include most graphing calculators (TI-84, TI-Nspire non-CAS, Casio fx-9860) and four-function or scientific calculators.

Not allowed

Calculators with CAS (TI-89, TI-Nspire CAS), laptop-based calculators, phone calculators, or anything with wireless capability are prohibited.

What this means for your prep

Do not leave this answer as background knowledge. Connect it to a practice decision: what to drill, when to test, how to pace a module, or how to interpret a score report.

If the answer is about timing or format, test it in a timed module.
If the answer is about scoring, run your current numbers through the score calculator.
If the answer is about tools or calculator policy, practice the relevant Math question type immediately.

What to practice after reading this

Open a Math bank set and use Desmos only when it saves a real algebra step.
Practice systems, nonlinear functions, and scatterplots with the calculator visible.
For every calculator miss, write whether the error was setup, graph reading, or answer-format conversion.