If your calculator dies, raise your hand, try a backup if you brought one, and keep moving. Enhanced ACT Math is built so most items can be done by hand. Do not freeze for five minutes on a dead battery.
Digital testers
Some on-screen tools exist, but they are not a full graphing replacement and not Desmos-on-SAT. Learn them before test day: digital ACT tools. Desmos question: can you use Desmos.
Paper testers
Staff will not always have a loaner. Switch to the backup or to pencil. Skip calculator-heavy items, finish the rest, then return. You should already know when the calculator is optional: when not to use the calculator.
The bottom line
Two calculators, fresh batteries, and a hand-math backup. A dead TI is an inconvenience, not a voided Math score.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.