Learning Retention Calculator
Calculate how much you'll remember based on the Ebbinghaus forgetting curve. Get optimal review schedules to maximize long-term memory retention.
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Hermann Ebbinghaus discovered that memory decays rapidly without reinforcement. The forgetting curve shows that:
- Within 1 hour: We forget about 50% of new information
- Within 24 hours: Retention drops to about 30%
- Within 1 week: Without review, only 20-25% remains
Spaced repetition interrupts this decay by reviewing material at optimal intervals, strengthening memory traces each time.