## Chess Elo Rating Difference CalculatorThis section will calculate the difference in Elo rating between two players from match results or winning percentage. It uses javascript to do the calculations.## Elo Rating Change CalculatorThis section will calculate the change in a player's Elo rating after playing a single game against another player. The value K is the maximum change in rating. |

Wikipedia Elo

see for details on the formula used for the calculations. (You can also right click on this page and

Slow Chess Blitz

my freeware chess program.