Compare calculators

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

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.

Chess

Tournament Performance Rating Calculator

Calculates your chess tournament performance rating from your score and opponents' ratings. Use it after a tournament to see the rating level at which you effectively played.

Average Opponent Rating (ELO)

Score Percentage (%)

Fill in the required fields to see your result.

Key differences

	Chess Rating Gain Projection Calculator	Tournament Performance Rating Calculator
Category	Chess	Chess
Inputs required	5	2
Result	Projected Rating (ELO)	Performance Rating (ELO)
What it does	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.	Calculates your chess tournament performance rating from your score and opponents' ratings. Use it after a tournament to see the rating level at which you effectively played.