Career & Growth · Free tool

Flashcard Study Time Estimator

Cards needed + study hours for N concepts at target retention. Spaced-repetition review schedule.

Updated April 2026

Concepts to memorize

Subject type

Target retention

Cards needed

100

Total study time

2.2 hrs

~130 min

Reviews per card

SM-2 style review schedule

Day 1#1Day 3#2Day 7#3Day 14#4Day 30#5Day 90#6

Tips for good cards

One fact per card — atomic prompts beat compound ones.
Use cloze deletion for definitions and dates.
Add an image or mnemonic for abstract concepts.
Rephrase in your own words; don’t copy textbook sentences verbatim.

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What it does

Retention isn’t linear — 6 months requires 2x the reviews of 1 month. Cards, hours, and an SM-2-style review schedule from day 1 to 90.

Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/flashcard-study-estimator" width="100%" height="720" frameborder="0" loading="lazy" title="Flashcard Study Time Estimator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>

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How to use it

Enter concepts + subject type.
Pick target retention.
Read cards + hours + schedule.