Calculate a Round Robin
Every parlay from 3-8 picks across all combinations.
How to Use This Calculator
- Tap to choose your odds format (Decimal, Fractional, or American)
- Set the unit stake — that’s the amount riding on each individual bet
- Add your picks (anywhere from 3 to 8) along with their odds
- Flag the outcome for every selection (Won, Lost, or Void)
- Dial in the minimum and maximum parlay sizes (e.g., 2-way through 3-way)
- Read off the total return, profit, and a clean breakdown by bet type
Formula
Round robin bets are calculated by generating all possible combinations of your selections at each fold size.
Number of combinations = C(n, k) where n = number of selections, k = fold size
For example, 4 selections with 2-way and 3-way parlays:
- C(4,2) = 6 doubles
- C(4,3) = 4 trebles
- Total: 10 bets
Frequently Asked Questions
What exactly is a round robin bet?
A round robin spins up every possible parlay combination from your picks at the fold sizes you choose. Take 4 selections, for instance — it builds all 6 of the possible 2-way parlays plus all 4 of the possible 3-way parlays.
How does a round robin compare to a standard parlay?
A standard parlay is a single ticket stacking all your selections together. A round robin breaks those selections across several smaller parlays, so a few can still land even when others miss.
Which fold sizes are the smart pick?
2-way parlays maximize your hit rate but pay out less. 3-way parlays sit in the sweet spot. Go bigger on the fold size and you get fewer, riskier tickets with bigger upside.