Chess Calculators
Last updated: October 2026
Chess Game Analysis Calculator
Calculate your chess game accuracy score based on blunders, mistakes, and inaccuracies relative to total moves played.
Chess Tournament Performance Rating Calculator
Calculate your chess tournament performance rating from your score and opponents' average rating.
Chess Elo Rating Change Calculator
Calculates the exact Elo points you gain or lose after a chess game using the official FIDE formula.
Chess Tournament Points Calculator
Calculates how many more points you need to hit a target score percentage in a Swiss tournament.
Chess Tournament Tiebreak Calculator
Computes Buchholz, Sonneborn-Berger, and Median tiebreak scores when players finish a chess tournament on equal points.
Chess Expected Score Calculator
Calculates the statistically expected score for a player against an opponent based on the ELO rating difference.
Chess Opening Win Rate Calculator
Calculates the performance score of a chess opening from win, draw, and loss totals, expressed as White's percentage score.
Chess Rating Goal Calculator
See what playing strength your results show today, what score a target rating needs against your usual opponents, and roughly how many months the goal takes at the rate you improve.
Chess Time Control Equivalency Calculator
Calculates the effective total game duration in minutes for any chess time control given base time, increment, and move count.
Chess Rating Progress Tracker
Estimate how many months it will take to reach your target chess rating given your recent progress, study hours, and weekly game volume.
Chess Rating Gain Projection Calculator
Projects your ELO rating after a chosen period based on win rate, games played per month, and K-factor.
Chess Tournament Round Calculator
Calculates the number of rounds needed for a Swiss system or round-robin chess tournament based on player count and games per round.
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.
Chess Position Value Calculator
Calculates the material balance on a chess board by entering each side's pieces and applying standard pawn-unit values.