FIDE Rating Calculator

Estimate your rating change after a tournament · For already-rated FIDE players

0 opponents Paste all opponent ratings at once and enter your total score.

Your rating

Opponent ratings

Your score

K factor

Separate ratings with spaces, commas, or new lines. Rated opponents only; ignore byes and unrated opponents.

✓ Done — results updated.

Enter each result individually for a true per-game breakdown and detailed analysis.

Show extra analysis after calculating Round-by-round chart, cumulative chart, best/toughest round, and detailed table.

✓ Done — results updated.

K factor options Manual K: 40

Use Auto K instead of manual buttons U18 & rating < 2300 Fewer than 30 rated games Ever reached 2400

Force custom K

Manual K is the default. Auto K follows the usual FIDE categories. Custom K overrides both; the K × games ≤ 700 rule still applies.

FIDE rules used by this calculator Show rules

This calculator estimates rating changes for already-rated FIDE players. It does not calculate an initial FIDE rating.

Rated games Enter rated opponents only. Ignore byes, forfeits, and games against unrated players.
Expected score Based on the FIDE expected-score table, not a generic online Elo formula.
400-point cap For players rated below 2650, a difference greater than 400 is treated as 400.
700 limit If K × number of games exceeds 700, K is reduced to the largest whole number keeping K × games ≤ 700.

Apply the 400-point cap when relevant Apply K × games ≤ 700

Source: FIDE Handbook — Rating Regulations. This is an estimator, not an official FIDE tool.

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New FIDE rating

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Rating change

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Performance

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Enter your rating, opponent ratings, and score, then calculate.

Details

This calculator estimates rating change for already-rated FIDE players using rated opponents only. Performance rating is shown only for 4+ games.