Compare calculators

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

Chess Opening Repertoire Depth Calculator

Calculates the total number of positions in your opening repertoire based on main lines, move depth, branching factor, and how efficiently you retain them. Ideal for planning structured opening preparation.

Number of Main Lines (lines)

Average Depth Per Line (moves)

Branching Factor

Memorization Efficiency

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 Opening Repertoire Depth Calculator	Chess Rating Gain Projection Calculator
Category	Chess	Chess
Inputs required	4	5
Result	Effective Repertoire Size (variations)	Projected Rating (ELO)
What it does	Calculates the total number of positions in your opening repertoire based on main lines, move depth, branching factor, and how efficiently you retain them. Ideal for planning structured opening preparation.	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.