Chess Elo Calculator
Compute expected score and rating change after a chess game.
35.99 %
Expected (A)
1520.48
A new rating
1579.52
B new rating
About this tool
Enter both players' Elo ratings, the result (1 = win, 0.5 = draw, 0 = loss) and a K-factor. Computes expected score and updated ratings using the classic Elo formula.