Compare calculators

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

Chess Tournament Performance Rating Calculator

Calculate your chess tournament performance rating from your score and opponents' average rating. Use this after any rated tournament to estimate the Elo rating you performed at.

Tournament Score (points)

Total Games Played (games)

Average Opponent Rating

Fill in the required fields to see your result.

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

Fill in the required fields to see your result.

Key differences

	Chess Tournament Performance Rating Calculator	Chess Rating Gain Projection Calculator
Category	Chess	Chess
Inputs required	3	5
Result	Performance Rating	Projected Rating (ELO)
What it does	Calculate your chess tournament performance rating from your score and opponents' average rating. Use this after any rated tournament to estimate the Elo rating you performed at.	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.