Elo Rating Calculator
Calculate Elo rating change from two ratings, game result and K-factor, including expected score and all outcome scenarios.
Presets use classic Elo math. Official federations and platforms may apply extra rules.
Player A
1,614.1(+14.1)
Started at 1600, expected score 0.297 (29.7%)
Player B
1,735.9(-14.1)
Started at 1750, expected score 0.703 (70.3%)
Expected score by rating difference
The Elo curve shows expected score over many games, not a guarantee for one matchup.
Compare all outcomes, K-factor: 20
| Outcome for A | A new rating | Change A | B new rating | Change B |
|---|---|---|---|---|
| Win | 1,614.1 | +14.1 | 1,735.9 | -14.1 |
| Draw | 1,604.1 | +4.1 | 1,745.9 | -4.1 |
| Loss | 1,594.1 | -5.9 | 1,755.9 | +5.9 |
Calculate Elo rating change
Elo intent is about expected score and rating delta after a result. The calculator uses the classic one-game Elo formula, not a platform-specific rating pipeline.
EA is expected score for player A.
Frequently Asked Questions
Sources and References
Calculations are based on the listed reference sources. Links open in a new tab.
Updated: