Round robin calculator: combinations, stakes and return

A round robin is several tickets

A round robin takes a set of selections and creates all combinations of a chosen size. Four selections played as doubles produce six two-leg tickets: AB, AC, AD, BC, BD and CD. C$5 per double means C$30 staked in total. The stake field below is per combination, not the budget for the whole set.

The number of combinations is n! ÷ [k! × (n − k)!], where n is the number of selections and k is the number per ticket. Five selections as trebles create ten tickets; the same five as doubles also create ten, but they contain different combinations and settle differently.

An example with one losing selection

Suppose all four selections have decimal odds of 2.00 and you place six C$5 doubles. If three selections win and one loses, three doubles win at 4.00 and three lose. Total return is C$60 against C$30 of stakes, giving C$30 net profit. If only two selections win, just one double returns C$20, leaving C$10 net loss.

Change a leg to void to see it treated at 1.00 within each affected ordinary accumulator. An all-void combination returns its own stake. The output shows combination examples; every combination is included in the totals.

Choose the ticket size before the stake

The number of tickets rises quickly as selections are added. This tool supports up to 12 selections and one combination size at a time. Mixed-size systems, related selections, promotional adjustments and bookmaker-specific rules can create a different set of tickets. Keep the accepted bet slip with its actual total stake.