Chess Calculators
Free chess calculators: ELO rating change, performance rating, tournament prize distribution, K-factor, and win probability tools.
Chess Clock Time Management Calculator
Calculate average time per move from your clock setting and expected game length. Shows opening, middlegame, and endgame time budgets to avoid time trouble.
Swiss Chess Tournament Rounds Calculator
Find how many rounds a Swiss chess tournament needs for any number of players. Shows minimum rounds, FIDE recommendation, total games, and pairing capacity.
Chess Time Per Move Calculator
Calculate time per move for any chess time control. Enter total time and increment to get average seconds per move and a phase-by-phase time budget.
Chess Draw Probability from Elo Gap Calculator
Estimate the probability of a chess draw based on Elo rating gap and time control. Closer ratings draw more often in classical time controls.
Chess Rating Progress Calculator
Project your chess rating improvement over time. Enter current rating, goal, and study hours to get a week-by-week rating growth chart.
Chess Elo Rating Change Calculator
Calculate your chess Elo rating change after a game. Enter both ratings, the result and your K-factor to get the expected score and your new rating.
Chess Material Value Calculator
Calculate the material balance in any chess position. See who is ahead in material and by how much using standard piece values.
Chess Performance Rating Calculator
Calculate chess performance rating from your tournament score and opponents average rating, and see where it lands against the FIDE 2450 IM and 2600 GM norms.
Chess Tournament Prize Split Calculator
Calculate prize money distribution when players tie for places in a chess tournament. Uses the standard prize-sharing method.