Work out round robin matches instantly with clear inputs, formula shown and shareable results.
A single round robin needs n x (n - 1) / 2 matches, which is the number of unordered pairs; an odd number of teams requires n rounds because one team sits out each round. Because the total grows with the square of the entry count, adding four teams to a twelve team league adds more than half again as many fixtures.
Match count
matches = n x (n - 1) / 2 x meetings per pair
Rounds
rounds = (n - 1) for even n, or n for odd n, times meetings per pair
matches = n x (n - 1) / 2 x meetings per pair. A single round robin needs n x (n - 1) / 2 matches, which is the number of unordered pairs; an odd number of teams requires n rounds because one team sits out each round.
Because the total grows with the square of the entry count, adding four teams to a twelve team league adds more than half again as many fixtures.
Enter number of teams, times each pair meets. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.