Learning Retention Rate Calculator
Learning Retention Rate Calculator computes the retention rate of learned material based on the Ebbinghaus Forgetting Curve.
Enter Parameters
Enter time since learning (e.g., 1 day)
Strength of memory, typically 0.5 to 2 (e.g., 1)
How to Use Learning Retention Rate Calculator:
- Enter the time elapsed since learning in hours, days, or weeks.
- Enter the memory strength (S), a positive value typically between 0.5 and 2.
- Click “Calculate” to compute the retention rate with steps.
- Use “Copy Result” to copy the retention rate to the clipboard (requires HTTPS).
Important Notes:
- Time elapsed must be non-negative.
- Memory strength (S) must be positive, typically 0.5 (weak) to 2 (strong).
- Formula: Retention Rate \( R = e^{-t/S} \), where \( t \) is time elapsed and \( S \) is memory strength.
- Retention rate is a percentage between 0% and 100%.
- Clipboard access requires HTTPS. If copying fails, copy manually.
Learning Retention Examples:
-
Short-Term Retention:
Time Elapsed=1 day, Memory Strength=1
Retention Rate: \( R = e^{-1/1} \approx 36.79\% \) -
Strong Memory:
Time Elapsed=24 hours, Memory Strength=2
Retention Rate: \( R = e^{-24/2} \approx 61.31\% \) -
Long-Term Retention:
Time Elapsed=1 week, Memory Strength=0.5
Retention Rate: \( R = e^{-7/0.5} \approx 8.32\% \)
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