Calculator policies differ slightly across the SAT, ACT, and AP exams, and showing up with the wrong device or an improperly cleared memory can cause real problems on test day. Here is exactly what each major exam allows and how to make sure your TI-84 is exam-ready.
Introduction
The good news for TI-84 owners is that every major standardized test in the United States that permits calculators explicitly allows the TI-84 Plus and TI-84 Plus CE, in both standard and Python editions. The policies differ mainly around calculator memory, exam sections, and what other calculator models are permitted alongside it.
This guide breaks down the SAT, ACT, and AP exam calculator policies individually, then covers how to clear your calculator's memory before an exam and what to do if your calculator fails on test day.
SAT Calculator Policy
The digital SAT allows an approved calculator for the entire Math section (there is no longer a no-calculator portion, unlike the older paper SAT). The TI-84 Plus and TI-84 Plus CE are both on the College Board's approved list, along with most other graphing calculators from major brands.
The digital SAT also provides a built-in Desmos graphing calculator directly in the testing application, so bringing a physical TI-84 is optional rather than required — many students still prefer the physical calculator they're most practiced with, which is a perfectly valid choice.
ACT Calculator Policy
The ACT permits calculators only on the Math section, and the TI-84 Plus and TI-84 Plus CE are both fully approved. Unlike the SAT, the ACT maintains a more detailed prohibited features list, banning calculators with built-in computer algebra systems (CAS) such as the TI-89 or TI-Nspire CAS — the standard TI-84 does not have CAS and is unaffected by this restriction.
The ACT requires that any calculator with typing-style QWERTY keyboards be excluded, which also does not apply to the TI-84's standard keypad layout. Check the ACT's official calculator policy page before test day if you use any less common calculator model, since the rules are updated periodically.
AP Exam Calculator Policy
AP Calculus AB and BC, AP Statistics, and AP Physics all permit the TI-84 Plus and TI-84 Plus CE. AP Calculus exams specifically require certain calculator capabilities during the calculator-allowed sections: plotting a graph and finding its zeros, computing a numerical derivative (nDeriv), and computing a numerical definite integral (fnInt) — all of which the TI-84 supports natively, as covered in this site's calculus guide.
AP Statistics similarly expects familiarity with the calculator's distribution and regression functions. Each AP Exam has both a calculator-required and calculator-not-permitted section on the same exam day, so know in advance which questions in your specific AP subject expect calculator use.
Clearing Your Calculator Memory Before an Exam
Some exams, particularly AP Exams, require proctors to clear calculator memory before the test or confirm it has been cleared, since stored notes or formulas would count as unauthorized aids. To reset everything, press 2ND then + (MEM), select 7:Reset, then All Memory, and confirm — this erases all programs, lists, and custom settings back to factory defaults.
Back up anything you want to keep before doing this, using TI Connect CE software on a computer, since a full memory reset cannot be undone. Do this several days before the exam rather than the morning of, in case you need to reinstall any allowed programs or reconfigure settings.
Backup Plans if Your Calculator Fails
Bring fresh AAA batteries (or a fully charged CE) plus a second calculator if you own or can borrow one, since proctors are not always able to provide replacements on short notice. Arriving to a testing center with a calculator you haven't verified is working within the past day is an avoidable risk.
If your calculator fails during an actual exam, immediately alert the proctor rather than trying to fix it yourself mid-test — most testing organizations have a documented process for equipment failure that may include extended time or a replacement device, but only if reported right away.
Further Reading & Sources