ELO Calculator

( version*)

   This is an unofficial rating calculator for ELO rating. It calculates how your ELO rating will change after you participated in a chess tournament (and before your new official ELO is published on Enter below your current ELO, the number of points you won in the tournament, the rating of the opponents whom you played, your K-factor** and click the 'Calculate' button.

 Enter player information         

 Enter ELO rating of opponents 

Enter the required info above and press calculate.

* Some more interesting functionallity has yet to come (for example - enter average rating of your expected tournament opponents and see the probability distribution of your new ELO).

** Note, that FIDE changed the K-factors as of July 2014 (see FIDE rating regulations - chapter 8.56):
  • K = 40 for a player new to the rating list until he has completed events with at least 30 games
  • K = 20 as long as a player's rating remains under 2400.
  • K = 10 once player's rating reached 2400.
  • K = 40 for all players until their 18th birthday, as long as their rating remains under 2300.