Home
Back
Performance Rating Formula:
Where dp is the rating difference based on your score percentage
| From: | To: |
Performance Rating (Rp) is a measure of a player's strength during a particular tournament or event, calculated based on the average rating of opponents and the player's score against them.
The calculator uses the standard FIDE performance rating formula:
Where:
Explanation: The dp value comes from FIDE's standard conversion table that maps score percentages to rating differences.
Details: Performance rating helps evaluate a player's strength in a specific event, independent of their official rating. It's particularly useful for assessing unrated players or evaluating performance in a single tournament.
Tips: Enter the average rating of all opponents (sum of all opponent ratings ÷ number of opponents) and your score percentage (your total points ÷ total possible points × 100).
Q1: How is performance rating different from regular Elo?
A: Performance rating measures strength in a specific event, while regular Elo is a long-term measure of player strength.
Q2: What's considered a good performance rating?
A: A performance rating significantly higher than your regular rating indicates strong performance. Tournament winners typically have the highest performance ratings in the event.
Q3: Can performance rating be used for rating calculations?
A: Yes, for unrated players or new ratings, performance rating can serve as an initial rating estimate.
Q4: How accurate is performance rating?
A: It's most accurate with many games (9+). With few games, it can be misleading due to statistical variance.
Q5: What if I score 50% against equally rated opponents?
A: Your performance rating will equal your opponents' average rating (dp = 0 for 50% score).