Multilingual Vocabulary Retention Tracker

Formulas

The Multilingual Vocabulary Retention Tracker uses the following formula:

• Retention Rate = (Number of Retained Words / Total Words Learned) × 100
• Session Efficiency = Retention Rate × (1 – (Missed Sessions Impact / Total Sessions))
• Where Total Words Learned = (Number of Retained Words / Retention Rate) × 100, and Missed Sessions Impact = (Total Sessions – Effective Sessions) / Total Sessions (assumed 90% session effectiveness)

How to Use

1. Enter the total number of learning sessions in the “Number of Learning Sessions” field.
2. Enter the number of words you retained in the “Number of Retained Words” field.
3. Optionally, use the language buttons to simulate practice (e.g., click to focus on a language).
4. Click “Calculate Retention” to see your results.
5. Scroll to the “Results” section for detailed calculations.
6. Use the share buttons to share your retention score or embed the calculator.

Examples

1. Example 1: Sessions = 10, Retained = 80
   Retention Rate = (80 / (80 / 0.8) × 100) × 100 = 80%
   Missed Impact = (10 – 9) / 10 = 0.1
   Session Efficiency = 80 × (1 – 0.1) = 72%
2. Example 2: Sessions = 20, Retained = 150
   Retention Rate = (150 / (150 / 0.75) × 100) × 100 = 75%
   Missed Impact = (20 – 18) / 20 = 0.1
   Session Efficiency = 75 × (1 – 0.1) = 67.5%
3. Example 3: Sessions = 5, Retained = 20
   Retention Rate = (20 / (20 / 0.6) × 100) × 100 = 60%
   Missed Impact = (5 – 4.5) / 5 = 0.1
   Session Efficiency = 60 × (1 – 0.1) = 54%