Matchmaking Rating Calculator

Calculate Elo rating changes from match results.

Player Rating

Opponent Rating

K-Factor

Result (1=Win, 0.5=Draw, 0=Loss)

Tab to move between fields

New Rating

1,520

Rating Change20

Expected Win %36%

Change if Win20

Change if Loss-12

Change If Draw4

How to Use This Calculator

Enter the Player Rating and Opponent Rating on the Elo scale.
Enter the K-Factor: 16 for established players, 32 for standard, 64 for new/provisional accounts.
Enter the Match Result: 1 for win, 0.5 for draw, 0 for loss.
Review the New Rating and Rating Change after the match.
Check Expected Win percentage and Change If Win/Loss to understand the stakes before the match.

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