Parlay & round robin calculator
Combinations
Select rows to combine bets| Bet type | Bets | Total stake | Return if all win |
|---|---|---|---|
| 4 | $20.00 | $40.00 | |
| 6 | $30.00 | $120.00 | |
| 4 | $20.00 | $160.00 | |
| 1 | $5.00 | $80.00 |
Returns include your stake and assume every pick wins. Estimates are rounded for display; sportsbook rules and per-ticket rounding may differ.
How round robins work
What is a round robin?
A round robin creates every parlay of a chosen size from your picks. With four picks, a round robin by 2s creates six separate two-pick parlays. By 3s, it creates four three-pick parlays.
How many bets does that make?
For n picks in groups of k, the number of bets is n! / (k! × (n − k)!). Each combination gets its own stake. Select multiple rows to combine bet types.
How are payouts calculated?
Multiply each pick’s decimal odds, then multiply by the stake per bet. For positive American odds, decimal odds are 1 + odds / 100. For negative American odds, they are 1 + 100 / |odds|. Add the returns from each combination. Net profit is total return minus total stake.
An example with four picks
At +100 odds and $5 per bet, combining round robins by 2s and 3s gives you 10 bets, a $50 total stake, and $280 returned if all four picks win. That is $230 net profit.
If some picks lose, only combinations containing those picks lose. This calculator shows the all-win return; it does not calculate partial-win outcomes, pushes, or voids. Standard odds multiplication does not model sportsbook same-game pricing.