SAT · SAT Math · March 28, 2026 · 5 min read
SAT Calculator Policy 2026: Bluebook, Desmos, and CAS Rules
By Makon AI Team · Updated July 15, 2026
For the 2026 SAT, students may use Bluebook’s embedded Desmos calculator or an approved handheld calculator throughout the Math section. Since the August 2025 weekend SAT, handheld calculators with computer algebra system (CAS) functionality are prohibited.
What Bluebook provides
The embedded calculator can toggle between Desmos scientific and graphing modes. It requires no separate device and is available during Math, but not Reading and Writing. Practice the exact interface in Bluebook before test day; website familiarity is useful but does not replace in-app rehearsal.
Which handheld calculators are allowed?
College Board’s current calculator policy allows qualifying non-CAS graphing calculators, scientific calculators, and four-function calculators (though basic four-function models are not recommended). The policy—not a reseller listing or old forum—is authoritative.
Prohibited features include:
- built-in CAS or symbolic algebra functionality;
- programs that solve/factor/expand algebra symbolically;
- QWERTY keyboards;
- wireless internet, Bluetooth, or cellular connectivity;
- cameras or audio/video recording;
- phone apps, laptops/tablets as calculators, and paper-tape devices.
Examples of prohibited CAS families include TI-89/TI-92 models, TI-Nspire models with CAS in the name, and HP Prime; the official list is broader and can change.
Test-day rules
Students cannot share calculators, must remove prohibited algebra programs and stored documents, turn sound off, and keep calculator covers under the desk. A handheld calculator cannot be used during Reading and Writing. Bring a familiar approved model with working batteries; calculator power cords are not allowed.
Desmos or handheld?
Choose from timed official practice. Desmos is powerful for intersections, roots, tables, regressions, and visual checks. A familiar handheld can be faster for arithmetic or students who dislike opening the graphing panel. You may use the embedded option even if you bring a handheld.
Match the tool to the task
Use Desmos strategically rather than typing every expression into it:
| Task | Efficient option | Final check |
|---|---|---|
| Solve a system | Graph both equations and inspect intersection | Read the requested x, y, or expression |
| Find real roots | Graph or enter the equation in a table | Confirm window and multiplicity/context |
| Regression | Enter data in a table and choose the stated model | Interpret parameters and units |
| Simple arithmetic | Mental math or scientific mode may be faster | Estimate magnitude and sign |
| Symbolic reasoning | Use algebra first | Calculator output does not prove a general identity |
Suppose two lines intersect at (4, 11), but the question asks for (x+y). Clicking the point provides information, not the final response; enter 15. Many calculator mistakes are actually failures to interpret the requested quantity.
Practice inside Bluebook
Website Desmos and the embedded calculator are similar, but test preparation should include the actual Bluebook workflow. Practice opening the calculator, switching modes, entering tables, adjusting the graph window, and returning to the question without losing your reasoning.
Complete at least two official Math modules using the device planned for test day. Record whether calculator use saved time, created transcription errors, or encouraged unnecessary graphing. The Bluebook simulation guide helps reproduce the rest of the testing environment.
Handheld approval checklist
Before relying on a separate calculator:
- Find the exact model name—not only the brand or product family.
- Compare it with the current College Board policy and model guidance.
- Confirm it has no CAS or other prohibited features.
- Remove prohibited documents/programs as required.
- Turn off sound and wireless capabilities.
- Install fresh batteries or charge it fully before test day.
- Practice without a power cord, which cannot be used in the testing room.
If eligibility is unclear, contact College Board or the test coordinator before the administration. Do not assume a calculator is allowed because a teacher permits it in class or an online seller calls it “SAT approved.”
CAS versus ordinary calculation
A computer algebra system can manipulate algebra symbolically—for example, factoring or solving expressions in a general symbolic form. The policy change targets CAS functionality and prohibited symbolic programs, not ordinary numerical calculation. A non-CAS graphing calculator can still graph, evaluate, and perform many numerical operations if it otherwise meets policy.
Because models and software can change, the official policy PDF should settle the question. Do not rely on a memorized list from an earlier SAT year.
What if the handheld fails?
Bluebook's embedded Desmos remains available during Math, so practice it even if a handheld is your preferred tool. If a permitted calculator stops working, follow proctor instructions; students cannot share devices. A backup calculator must independently satisfy the policy.
Your mathematical setup should also survive a tool switch. Know how to enter an equation, understand what the graph represents, and estimate whether the displayed result is plausible.
Common policy and use mistakes
- Bringing an approved calculator family but the prohibited CAS version.
- Planning to charge through a wall outlet during testing.
- Leaving wireless, sound, stored documents, or prohibited programs enabled.
- Using a phone calculator or separate laptop/tablet.
- Opening a calculator during Reading and Writing.
- Reading the y-coordinate when the prompt requests x.
- Trusting a graph without adjusting the visible window.
Use calculator tips for method selection and Desmos strategies for targeted practice. Policy compliance and efficient use are separate skills; train both.
Our calculator tips, Desmos math strategies, and Bluebook simulation guide help you rehearse.
Because College Board says calculator guidelines may change annually, recheck the policy shortly before the administration rather than relying on this summary alone.
The safest 2026 plan is to know the embedded Desmos tool, verify any handheld by exact model, remove prohibited features, and rehearse under official timing. A calculator should shorten valid mathematics—not replace reading, setup, units, or a final reasonableness check.