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Both calculators run independently — change the inputs on either side to compare results.

Chess Elo Rating Change Calculator

Calculates the exact Elo points you gain or lose after a chess game using the official FIDE formula. Enter your rating, opponent's rating, result, and K-factor to see your updated score.

Your Current Rating (Elo)

Opponent's Rating (Elo)

Game Result

K-Factor

Chess

Chess Rating Gain Projection Calculator

Projects your ELO rating after a chosen period based on win rate, games played per month, and K-factor. Ideal for setting realistic improvement goals over weeks or months.

Current Rating (ELO)

Win Rate (%)

Games Per Month (games)

Time Period (months)

Average K-Factor

Key differences

	Chess Elo Rating Change Calculator	Chess Rating Gain Projection Calculator
Category	Chess	Chess
Inputs required	4	5
Result	Rating Change (points)	Projected Rating (ELO)
What it does	Calculates the exact Elo points you gain or lose after a chess game using the official FIDE formula. Enter your rating, opponent's rating, result, and K-factor to see your updated score.	Projects your ELO rating after a chosen period based on win rate, games played per month, and K-factor. Ideal for setting realistic improvement goals over weeks or months.