FIDE ELO & Performance Rating Calculator
This
FIDE performance rating calculator
allows you to calculate your
ELO performance rating based on
tournament results using the official FIDE formula.
Calculate your official FIDE ELO performance in seconds.
Based on the latest FIDE regulations.
No login required • Instant results • Tournament-ready
This ELO performance calculator lets you calculate your FIDE performance rating based on your full tournament results, using the official FIDE method.
The FIDE Elo calculator you just used, plus a
real tournament clock.
Free on iPhone, no account, works offline.
Want to understand how FIDE performance rating is calculated? Learn the formula →
Rating changes are calculated using a fixed initial rating for all games.
This differs from official FIDE calculations, which are performed sequentially (game by game) and separately for each tournament.
FIDE applies a limit where K × number of games ≤ 700 per rating period. If exceeded, K is automatically reduced.
How to use this ELO calculator
This tool calculates your rating change based on your full tournament results. You should enter all your available games. Calculating rating changes one game at a time will lead to inaccurate results.
What is the K-Factor?
The K-factor determines how much your rating changes after a tournament. K40 is used for new players or under 18, K20 for most players, and K10 for experienced players who have reached a 2400 rating.
Enter all games
Add each opponent and result. The calculator computes your total rating change using the official FIDE method based on your overall performance.
Avoid common mistakes
Rating changes are not calculated independently for each game. They depend on the full set of results and the strength of your opponents.
Why use this FIDE calculator?
- No login required
- Instant calculation
- Based on official FIDE formula
How to calculate performance rating in chess
Performance rating is based on the average opponent rating and your score. This tool automatically applies the official FIDE performance rating formula .
FIDE performance rating formula explained
The FIDE performance rating is calculated using the average rating of your opponents and your score. It is commonly used in tournaments to evaluate player strength and compare performance across events. The formula adjusts your expected score against each opponent and converts your performance into a rating value.
What is FIDE performance rating?
It measures how strong you performed in a tournament, independently from your starting rating.
How many games to reach your target rating?
Use the FIDE ELO Progression Calculator to estimate how many rated games you need to reach your chess rating goal, based on your real FIDE history.
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