Calculates changes in player or team ratings based on the outcome of a match using the Elo rating system.
Start with your values, or try a preset.
Enter Player A's Rating, Player B's Rating, Outcome: Player A's Result, and K-factor (Development Coefficient) in the units shown.
Read Player B's Expected Score, Player A's Expected Score, Player B's New Rating, Player A's New Rating, Player B's Rating Change, and Player A's Rating Change in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Player A's Rating: 1,500; Player B's Rating: 1,500; Outcome: Player A's Result: Win; K-factor (Development Coefficient): 32
Player B's Expected Score: 0.5; Player A's Expected Score: 0.5; Player B's New Rating: 1,484; Player A's New Rating: 1,516; Player B's Rating Change: -16; Player A's Rating Change: 16
Player A's Rating: 1,600; Player B's Rating: 1,500; Outcome: Player A's Result: Loss; K-factor (Development Coefficient): 32
Player B's Expected Score: 0.3599350002; Player A's Expected Score: 0.6400649998; Player B's New Rating: 1,520.48208; Player A's New Rating: 1,579.51792; Player B's Rating Change: 20.48207999; Player A's Rating Change: -20.48207999
Player A's Rating: 1,700; Player B's Rating: 1,600; Outcome: Player A's Result: Draw; K-factor (Development Coefficient): 32
Player B's Expected Score: 0.3599350002; Player A's Expected Score: 0.6400649998; Player B's New Rating: 1,604.48208; Player A's New Rating: 1,695.51792; Player B's Rating Change: 4.482079994; Player A's Rating Change: -4.482079994
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