Round Robin Helper
Make every parlay from 3-8 picks and see all the 2-way and bigger combos.
How to Use This Calculator
- Pick the odds format you’d like to work in (Decimal, Fractional, or American)
- Type in your unit stake, which is the amount that goes on each individual bet
- Add your selections (anywhere from 3 to 8) along with the odds for each
- Mark how each selection finished (Won, Lost, or Void)
- Decide on the smallest and largest parlay sizes you want to include (for example, 2-way up to 3-way)
- Check out the total return, your profit, and a handy 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 takes your selections and builds every possible parlay combination at the fold sizes you’ve chosen. As an example, four picks would give you all 6 possible 2-way parlays and all 4 possible 3-way parlays.
How does a round robin compare to a normal parlay?
A standard parlay is a single bet that ties all your selections together. A round robin instead breaks them up into several smaller parlays, which means some can still come in even when others don’t.
Which fold sizes are best to pick?
2-way parlays give you the best chance of landing a winner but pay out less. 3-way parlays sit nicely in the middle. Larger fold sizes mean fewer, riskier bets, but the potential payouts are much bigger.