Table Tennis (Ping Pong) Elo Rating Calculator
See how your table tennis or ping pong rating changes after a match.
Enter both player ratings to get win probability and the points won or lost.
Table tennis uses an Elo-based rating system — the same mathematical framework used in chess, and adapted by the ITTF (International Table Tennis Federation) and many national associations.
Expected score formula: E = 1 / (1 + 10^((Rb − Ra) / 400))
Where:
- Ra = your current rating
- Rb = opponent’s rating
- E = your expected score (probability of winning, between 0 and 1)
Rating change formula: New Rating = Old Rating + K × (Actual Score − Expected Score)
Where:
- K = K-factor (how sensitive the rating is to results)
- Actual Score = 1 for a win, 0 for a loss, 0.5 for a draw
K-factor guidelines:
- K = 32: New players or recreational leagues
- K = 24: Established players
- K = 16: Top-rated players (ITTF uses variable K based on tournament category)
ITTF rating categories (approximate):
- Under 1000: Beginner
- 1000–1500: Intermediate / club player
- 1500–2000: Advanced club / national junior
- 2000–2400: National senior / regional elite
- 2400–2700: International / continental
- 2700+: World elite (top 100)
World record reference: The highest ITTF rating ever recorded was by Ma Long (China) at approximately 2870. Timo Boll (Germany) held the world No. 1 ranking for many years with ratings around 2800+.
Practical insight: Beating a much higher-rated player gives you many more points than beating someone at your level. Losing to a much lower-rated player costs you many more points than losing to a peer. This is what makes the Elo system self-correcting over time.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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