The program is designed for FIDE chess players of all rating categories. It calculates all Elo results for a game, tournament, or chess event by the rules of FIDE. The program displays Rating Increase, Rating Change, New Rating, Performance, Expected Result, Opponents' Average, Grandmaster and International Master Norms. Chess Calculator has been tested with the FIDE Players' Database and Tables of Grandmaster and International Master Norms.