Parlay Calculator
Combine any number of legs into one parlay. Enter each leg’s odds and your stake to get the combined odds, total payout and profit.
How parlay odds are calculated
A parlay (or "accumulator") combines several bets into one. Every leg must win or the whole ticket loses. Because you're compounding, the odds multiply — which is why parlays pay big but hit rarely.
combined decimal odds = leg1 × leg2 × leg3 …, then payout = stake × combined decimal.
Worked example
Two legs at -110 (1.909) and +120 (2.20). Combined decimal = 1.909 × 2.20 = 4.20 → about +320. A $20 stake returns $84 (a $64 profit). The implied probability of both hitting is only 23.8%.
The catch parlays hide
The vig compounds on every leg, so a parlay's true hold is much larger than any single bet's. Parlays are only +EV if each individual leg is +EV — check them one at a time with the EV calculator first.
Stop doing this by hand
These calculators do one bet at a time. PropPrizm's EV+ board runs the de-vig and EV math across every book, on every prop, live — and surfaces only the ones where a book is soft versus the market consensus.
See the EV+ board →Frequently asked questions
How is a parlay payout calculated?
Convert each leg to decimal odds, multiply them together for the combined decimal, then multiply by your stake. The result is your total return; subtract the stake for profit.
Are parlays a good bet?
Parlays carry a compounded margin, so they favor the book more than single bets. They are only worth it when every individual leg is already +EV — the parlay does not create value, it just multiplies whatever edge (or vig) each leg carries.
What is the difference between a parlay and a same-game parlay?
A standard parlay combines independent games. A same-game parlay combines legs from one game, which are correlated — books price that correlation in, so the naive multiplied odds above do not apply to SGPs.