An independent referenceYes. The Casio fx-991CW is allowed for the Digital SAT Math section in 2026 as a physical, non-CAS scientific calculator. This verdict does not cover phone apps, emulators, altered firmware, or different Casio models.
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Yes. The Casio fx-991CW is allowed for the Digital SAT Math section in 2026 as a physical, non-CAS scientific calculator. This verdict does not cover phone apps, emulators, altered firmware, or different Casio models.
Based on the current College Board SAT calculator policy, this verdict treats the Casio fx-991CW as approved for Digital SAT Math because the policy allows scientific calculators and separately bans CAS functionality, communication devices, apps, computers, and other prohibited hardware. The stored calculator data identifies the fx-991CW as a standalone ClassWiz scientific calculator with no graphing and no CAS. That matters because College Board no longer maintains a simple list of every permitted graphing model, so the safer editorial check is feature-based: scientific category, physical handheld, battery or solar powered, no CAS, no phone app, no wireless device, and no symbolic algebra program. The page is intentionally narrow. It approves this exact physical calculator for SAT Math use, not every fx-991 listing, emulator, classroom bundle, or future regional variant.
College Board says scientific calculators are permitted for SAT Math, while CAS calculators, phone apps, computers, wireless devices, and symbolic algebra programs are prohibited. The stored calculator data describes the Casio fx-991CW as a standalone non-CAS scientific calculator, so this verdict applies that feature-based policy to the exact physical model.
“Graphic, scientific, and 4-function calculators are allowed, subject to the restrictions below.”
Use the Casio fx-991CW as a physical calculator for SAT Math, not through a phone, tablet, computer, browser extension, emulator, or copied app.
Keep the model label visible enough for inspection, especially when a family name has CAS and non-CAS variants that can be confused.
Have the calculator powered, charged, and familiar before test day; approval does not guarantee replacement batteries, cables, or troubleshooting time.
The Digital SAT also includes Desmos in Bluebook, but bringing a familiar approved handheld calculator is still allowed for the Math section.
This verdict is for the SAT Suite calculator policy context. AP exams use a separate College Board calculator policy and may differ by subject.
Recheck the official SAT policy if your testing date is far away or your calculator differs from the exact model named in this verdict.
For planning, write down the exact model, color, serial-style label, borrowed owner, backup choice, charger, batteries, cover, and accessories before exam morning so no last-minute substitution changes the device being evaluated.
If you buy secondhand, avoid vague listings, regional editions, school bundles, modified firmware, missing labels, cracked screens, unreadable keys, or seller claims that cannot be matched to the authority's written policy.
Earlier ClassWiz scientific calculator with no graphing, no CAS, and dual solar plus battery power.
Non-graphing scientific calculator with a four-line display and no programmable or CAS feature.
Advanced scientific calculator with equation, statistics, and matrix tools, but no graphing or CAS feature.
Yes. This page treats the physical Casio fx-991CW as allowed for the Digital SAT Math section because it is a non-CAS scientific calculator. The conclusion depends on using the actual handheld model, not a phone app, emulator, browser tool, modified device, or different calculator family.
No calculator is required, and Bluebook includes an embedded Desmos calculator for SAT Math. Many students still prefer a familiar handheld for arithmetic, fractions, statistics, and matrix-style workflows. If you bring one, it must still follow College Board's handheld calculator policy.
Yes. The fx-991CW is stored in this guide as a scientific calculator without CAS. College Board's SAT policy prohibits CAS functionality, including symbolic algebra manipulation. Do not substitute a ClassPad, graphing CAS model, emulator, or calculator with symbolic algebra programs and assume the same answer.
No. This page answers the Digital SAT question only. University exams, AKTU exams, AP subjects, classroom tests, and admissions tests can use different calculator rules, so check the exact authority for that exam before relying on the SAT verdict.
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