ACT Math Flashcards (Free Online: Formulas, Terms & Concepts)
Use these free ACT Math flashcards to lock in the formulas, terms and concepts you need for test day. Flip each card, mark it Know it or Review again, and the tool remembers your progress so you can restudy just the ones you missed. Filter by topic or card type, and many cards include a quick diagram. The ACT gives you no formula sheet — these cards cover every formula you have to memorize, including trigonometry.
How to study with these flashcards
- Pick a topic and card type, or study the whole deck.
- Read the front, then flip the card to check the answer.
- Mark each card Know it or Review again — then restudy the ones you missed.
What’s on the cards
The deck covers every ACT Math area — numbers, fractions and percents, ratios and proportions, exponents and roots, algebra, functions, coordinate geometry, geometry, and data and statistics — plus key facts about the ACT Math test itself. Formula cards follow the official references, with diagrams for the geometry and graphing topics.
Frequently asked questions
Are these ACT Math flashcards free?
Yes — completely free, no sign-up. Your know-it / review progress is saved in your browser so you can pick up where you left off.
What do the flashcards cover?
Formulas, key terms, and concepts across all ACT Math topics, with diagrams on the geometry and graphing cards, plus facts about the test format and scoring.
Can I study just the cards I got wrong?
Yes — at the end of a deck, choose ‘Study the cards I missed’ to restudy only the ones you marked Review again.
Can I focus on one topic?
Yes — filter by topic (like Algebra or Geometry) or by card type (formulas, terms, or concepts).
Pair these with the ACT Math formula cheat sheet and a full-length ACT Math practice test. See all our free math flashcards.
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