Official Elo Engine

FIDE Rating Calculator

Calculate your official FIDE rating gains or losses, expected scores, and tournament performance rating (TPR) based on the official World Chess Federation Elo handbook formulas.

Single Match Rating Change

Official FIDE Handbook §9.2

👤 Your Rating (Player A) Standard Club (1650)

⚔️ Opponent's Rating (Player B) Challenger (1720)

Match Result Click one

K-Factor Rating coefficient

Rating Delta (ΔR) +12.0

New FIDE Rating 1662.0

Expected Score (We) 40.1%

Opponent rated 70 pts higher (Expected score: 40.1%). A win earns +12.0 Elo points.

FIDE Rating Calculator

Single Match Rating Change

Tournament Performance Rating (TPR)