ELO Predictor
Simulate your next FIDE rating using the official FIDE formula. Set your rating, K-factor, and add games — the calculator handles the rest in real time.
ELO Predictor
Games
10
Predicted Rating
1500
Change
0
How it works
- Expected score: E = 1 / (1 + 10(Ro − Rp) / 400) — capped at a 400-point difference.
- New rating: Rn = Ro + K × (S − E), where S is 1 / 0.5 / 0 for Win / Draw / Loss.
- K-factor: 40 for new players (< 30 games), 20 below 2400, 10 once 2400 has been reached.