Parlay Builder
American, Decimal, Fractional, or Implied % — mix formats freely
2 legs
Enter odds for at least 2 legs to calculate your parlay.
Free Tools
Add up to 12 legs in any odds format. See combined odds, exact payout, and the true probability of winning your parlay.
American, Decimal, Fractional, or Implied % — mix formats freely
Understanding Parlays
Why parlays pay more — and what the sportsbook keeps.
Parlay odds are simply the product of each leg's decimal odds. A 3-leg parlay at 1.91 × 1.91 × 1.91 = 6.97 decimal, or about +597. The payout is your stake × combined decimal odds. Formula: payout = stake × (dec₁ × dec₂ × … × decₙ)
Each leg carries the sportsbook's vig (~4.5% per leg at -110). In a parlay, that vig compounds multiplicatively. A 3-leg parlay at standard juice has roughly 13% house edge; a 6-legger has ~25%. The true fair payout is always higher than what books pay.
The win probability shown is implied by the odds given — it includes the book's vig, so the true probability of winning is slightly lower. A 3-team parlay at -110 each has a ~12.5% implied win probability. You'd need to win 1-in-8 to break even long-term.
Parlays are highest EV when you have correlated legs (same game, where one outcome makes another more likely). A QB throwing for 300 yards is correlated with his team scoring — parlaying both gives you fair or better odds. Standard multi-game parlays are entertainment, not edge.
The calculator multiplies your legs; the guide shows the formula behind it, and the chart lists every leg count from 2 to 12 at the standard price. Combined odds include the sportsbook’s margin on each leg, so the implied probability shown is not a true probability.