Elo Rating Calculator
Calculate Elo rating changes and win probabilities for competitive games.
Match Parameters
Higher K = larger rating changes. FIDE uses 10-40 based on rating.
New Rating
1520
+20 (Class C)
Win Probability
Win Chance36.0%
Lose Chance64.0%
Rating Changes
Expected Score36.0%
Your Change+20
Opponent Change-20
Elo Tiers
Grandmaster2400+
Master2200-2399
Expert2000-2199
Class A1800-1999
Class B1600-1799
Class C1400-1599
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.