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 carries roughly a 13% built-in hold; 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.
When two outcomes are related (same game: a QB's passing yards and his team's total), the simple multiplication this calculator uses no longer describes their combined probability. Sportsbooks price same-game parlays with in-house correlation models and typically build in more margin on them, not less. Cross-game legs are the only case where the math on this page applies as written. To see what a real parlay's price implies against its true combined probability, use our parlay truth-teller.
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.