Compare n' Bet™

Parlay Calculator

Combine two to twelve legs and calculate the true combined odds, total payout, and profit. Useful for cross-book parlays your sportsbook's bet slip can't build, or for checking parlay math before you place a ticket.

Parlay setup
Legs
Results
Combined American — Risk vs. win at $100
Combined Decimal — Total return per $1 staked
Total Payout — Includes your stake back
Profit on Win — Payout minus stake

How the parlay math works

A parlay combines multiple bets into a single ticket. For it to pay out, every leg has to win. Miss one, and the whole thing loses. That's why parlays have such large potential payouts compared to a single bet.

The math is simple multiplication. Convert every leg to decimal odds, multiply them all together, and you have the combined decimal odds. Multiply by your stake to get the total payout. Subtract your stake to get the profit.

Example

Three legs at -110 each. In decimal, that's 1.9091 × 1.9091 × 1.9091 = 6.9576. A $10 parlay pays $69.58 total ($59.58 profit). In American format, that combined price is about +596.

Where parlays are useful vs where they're not

Parlays get a bad reputation among sharp bettors because the sportsbook's margin (the vig) compounds across legs. A three-leg parlay at -110 per leg has more built-in house edge than three separate straight bets at -110. If every leg has negative expected value at its fair price, combining them doesn't magically create positive value.

That said, parlays have legitimate use cases. If you believe multiple legs are +EV on their own, combining them creates correlated +EV value. If you want to turn a small stake into a chance at a large payout and you're comfortable with the high variance, parlays deliver that. And cross-book parlays, where your bet slip can't combine legs from different sportsbooks, are the only way to construct those tickets at all.

Types of parlays this calculator works for

  • Traditional parlays from a single sportsbook, assuming standard multiplicative pricing.
  • Cross-book parlays, where you're mentally combining bets placed at different books to see your overall exposure.
  • Independent-leg calculations for checking whether the price the sportsbook is offering on a pre-built parlay matches the true math.

This calculator assumes the legs are independent events. It does not apply to same-game parlays, which are priced using correlation models and typically don't multiply cleanly. A sportsbook's same-game parlay price will almost always be worse than the straight parlay math would suggest.

Related reading

The parlays guide covers when parlays make sense and when they don't. The same-game parlays guide explains why SGPs work differently. The odds converter handles individual-leg format conversions.

This calculator is for informational purposes only. Compare n' Bet does not provide betting advice, guarantees, or predictions. If you or someone you know has a gambling problem, call 1-800-522-4700 or visit ncpgambling.org.