ELO Rating Calculator

Calculate Your New Rating

Your Current Rating:

Opponent’s Rating:

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

Select K-Factor:

FIDE’s New Rating Rules:

K is the development coefficient.
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 a player’s published rating has reached 2400 and remains at that level subsequently, even if the rating drops below 2400.
K = 40 for all players until their 18th birthday, as long as their rating remains under 2300.
K = 20 for RAPID and BLITZ ratings all players.

For Ro >= 2400 K = 10, For 2000 ≤ Ro < 2400 K = 20, For 1600 ≤ Ro < 2000 K = 30 and For Ro < 1600 K = 45.