Parlay Calculator
Build multi-leg parlays and instantly see combined odds, potential payouts, and implied probability. Supports up to 15 legs.
Enter American odds for each leg and a wager amount to see results
Quick Examples
Understanding Parlays
What Is a Parlay?
A parlay (also called an accumulator or multi-bet) combines multiple individual bets into a single wager. All legs must win for the parlay to pay out. The odds multiply together, creating the potential for large payouts from small stakes. However, the more legs you add, the harder it becomes to win.
How Are Parlay Odds Calculated?
Parlay odds are calculated by converting each leg to decimal format and multiplying them together. For example, two legs at -110 each: each converts to 1.909 decimal, and 1.909 x 1.909 = 3.644 combined decimal, which equals about +264 in American odds. A $100 wager would return $364.46 if both legs win.
The House Edge on Parlays
Parlays compound the sportsbook's margin with each leg you add. A standard -110/-110 two-outcome market has roughly 4.5% vig. On a two-leg parlay, the effective vig rises to about 9%. On a four-leg parlay, it can exceed 18%. This is why parlays are among the most profitable bet types for sportsbooks -- and why understanding the math matters before placing them.
Correlated Parlays
A correlated parlay combines outcomes that are statistically related. For example, betting on a team to win and the game to go over the total in a matchup where that team's wins tend to be high-scoring. Most sportsbooks restrict obviously correlated parlays, but understanding correlation can help you identify edges in same-game parlay offerings.