The ACT gives you no formula sheet. Every formula you need, from the quadratic formula to the Law of Cosines, has to be in your head before you sit down. After 20+ years of tutoring, I see this gap constantly. Strong math students freeze on formulas they technically know but can’t recall fast enough under pressure. That’s why we built the ACT Math Flashcards.
The deck has 57 cards covering every formula and concept that shows up on the ACT Math section. The whole tool is free with no signup or login required.
What’s Covered
The cards span all six ACT Math content areas: Number & Quantity, Algebra, Functions, Geometry, Statistics & Probability, and Applied Math. You’ll find the essentials (slope, the Pythagorean theorem, SOHCAHTOA) alongside the higher-level material that often shows up at the top of the section: logarithm rules, trig identities, and the Law of Sines and Cosines.
Every card is tagged with a score range: foundational (13–23), proficient (24–32), or advanced (33–36). The tagging lets you focus on what’s actually within reach for where you are right now. (If you’re still working out what to aim for, our guide to what counts as a good ACT score has the context.)
How It Works
The flashcard tool is interactive. Filter by content category or by score range, flip cards to reveal formulas, and hit “I know this” to pull mastered cards out of your deck. Each pass through the deck shrinks it down to the cards you haven’t mastered yet.
Short daily sessions work far better than marathon cramming. Ten minutes a day for two weeks will do more for your score than two hours the night before the test.
Formulas Are the Floor, Not the Ceiling
Memorizing a formula is step one. Knowing when to use it under timed pressure is what separates a 26 from a 30. Once you’ve worked through the flashcards, pair them with the ACT Math practice drills: 22 drills covering every content area, each with five questions and full explanations. Formula recall plus applied practice is what builds test-day readiness.
For the rest of your ACT prep, see the ACT hub.