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How Many Flashcards Per Day? The Review-Load Math

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TL;DR. Most learners do well with 10 to 30 new flashcards a day. The number that matters isn't new cards, it's reviews: with spaced repetition, daily reviews settle at roughly 5 to 10 times your daily new cards after a few weeks. At about 8 to 10 seconds per review, 20 new cards a day costs 15 to 35 minutes daily once things stabilise. Choose your new-card number from the time you can actually give every day, not from how much material you want to cover. If you're building decks from your own notes, the AI flashcard maker makes cards fast, which makes this discipline more important, not less.

Why "new cards" is the wrong number to watch

When you add a card to a spaced repetition system, you're not doing it once. You're committing to seeing it again tomorrow-ish, then in a few days, then in a week or two, then a month, and so on, plus extra reviews every time you forget it.

So each new card creates a stream of future reviews. Add 30 new cards on Monday and you've effectively scheduled work for the next several months. Stack thirty of those days together and the reviews pile up. That is why people who start with 100 new cards a day in week one are often quitting in week four.

The rule of thumb: reviews ≈ 5-10x new cards

The exact ratio depends on how hard your cards are and how often you forget, but for a steady daily habit the long-run review load lands in a fairly consistent band:

  • Easy, well-written cards, high retention: closer to 5x.
  • Hard material, some badly written cards, frequent lapses: closer to 10x or above.
  • For reference, Anki ships with defaults of 20 new cards per day and a 200 maximum reviews per day, which reflects the same ratio (up to about 10x).

    The daily-load table

    Assume about 8 seconds per review for simple facts, longer for complex cards.

    New cards/daySteady reviews/dayTime at 8 sTime at 15 s (harder cards)
    525-503-7 min6-13 min
    1050-1007-13 min13-25 min
    20100-20013-27 min25-50 min
    30150-30020-40 min38-75 min
    50250-50033-67 min63-125 min

    Add the time for learning the new cards themselves (first exposure takes longer than a review, often 20-30 seconds each), and 20 new cards a day realistically means 20 to 40 minutes daily.

    How to choose your number

    Work backwards from time.

  • How many minutes can you give every single day, including your worst day of the week? Not your best day. Say 25.
  • Estimate your seconds per card. Language vocabulary: maybe 6-8 s. Pharmacology or law: 12-20 s.
  • Pick new cards so the review band fits. At 25 minutes and 8 s per card, that's about 190 reviews; divide by 7 or 8 and you get roughly 20-25 new cards a day.
  • If you have a deadline, check the maths the other way too: 1,200 cards to learn in 60 days is 20 a day. If that doesn't fit your time, the answer is fewer cards (cut what isn't essential), not a bigger daily number you'll abandon.

    Example schedules

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    Language learner, 20 minutes a day. 10-15 new vocabulary cards daily. Around 1,000 new words in three months. See our vocabulary quiz strategies for what to put on those cards.

    Student with a midterm in 5 weeks, 30 minutes a day. Build a deck after each lecture: about 20-25 cards per lecture, three lectures a week, so around 10 new cards a day averaged. Review daily. In the final week, add no new cards; switch to practice quizzes from the same notes.

    Medical student in dedicated board prep, 2 hours a day on cards. 60-100 new cards a day is common and sustainable only if reviews are done every day. See flashcards for medical school.

    Signs your number is too high

  • Your review count keeps rising week after week with no plateau.
  • You routinely finish reviews at the end of the day, rushed and guessing.
  • Your "Again" rate climbs above about 20%.
  • You start skipping days. This is the worst sign, because reviews compound.
  • The fix is not a heroic catch-up day. Set new cards to zero for a few days, clear the backlog, then restart at half your previous number.

    Signs your number is too low

  • Reviews take under five minutes and you're bored.
  • You're on track to finish the material well after your exam.
  • Raise new cards by five a day and give it two weeks to see the effect, because reviews lag behind new-card changes.

    Card quality changes the maths

    Badly written cards are expensive. A vague card you keep failing gets rescheduled soon, over and over. Ten such "leeches" can cost more time than a hundred good cards. Two practical habits:

  • Rewrite or delete any card you've failed several times. It's the card, not you.
  • Keep one idea per card. How to write good flashcards covers this in detail.
  • How this works in SimpleQuizMaker

    SimpleQuizMaker reviews use an SM-2-based spaced repetition scheduler: you rate each card and its next interval stretches or shrinks. It doesn't have Anki's full panel of daily limits and learning-step settings, so you control load mostly by how many cards you create.

    That's the useful constraint. Decks are 5 to 50 cards (up to 20 on the free plan, up to 50 on Student), generated from a topic or from up to 50,000 characters of pasted notes, and you can delete cards you don't need right after generation. One 20-card deck per study day, edited down to the 15 that matter, is a sustainable rhythm for most students.

    Generation limits also help: 5 AI generations a month on the free plan and 25 on Student ($2.99/month), shared with quizzes. For the underlying theory, read the spaced repetition guide, and for a lighter manual approach, the Leitner system.

    The short version

  • Pick new cards from time, not ambition.
  • Expect reviews at 5-10x new cards.
  • Never skip review days; cut new cards instead.
  • Delete and rewrite cards that keep failing.
  • Ready to set a pace you can keep? Make today's deck with the free flashcard maker, cap it at 20 cards, and see what your review load looks like after two weeks.

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    James Okafor

    EdTech Researcher & Instructional Designer

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