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The Ebbinghaus Forgetting Curve

The Ebbinghaus forgetting curve is a graph illustrating the principle of storage decay, which shows how memory for new information declines over time. The graph plots 'Retention (%)' on the y-axis against 'Elapsed time since learning' on the x-axis. It demonstrates a rapid initial loss of memory, which then slows and levels out. According to the curve, retention is 100% immediately after learning but drops to approximately 55% after 20 minutes and 40% after an hour. The decline continues to about 30% retention after 24 hours, eventually stabilizing at around 10% after 31 days.

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Updated 2025-10-09

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