Parlay Calculator
A parlay calculator multiplies the decimal prices of every leg to find combined odds, then applies your stake to estimate profit and payout. Because every selection must win, adding legs usually lowers the implied probability quickly. The displayed return does not account for correlation or whether the sportsbook’s combined price is fair.
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A parlay combines multiple legs into one bet: higher payout, higher risk. This calculator shows combined odds, implied probability, and total payout so you know exactly what you're getting—and how much vig is built in.
Parlays have hidden pitfalls. Read about common parlay math mistakes before you build your next ticket.
Parlay Calculator
Enter odds for each leg and a stake to see total odds, implied probability, and payout.
Worked example: three legs at -110 each
A parlay pays the product of every leg’s decimal odds. -110 is 1.9091 in decimal, so three -110 legs multiply to 1.9091 × 1.9091 × 1.9091 = 6.9579. Converted back, that is +596. A $10 ticket pays $69.58 if all three hit, for $59.58 of profit, and the combined implied probability is 14.37%.
Now price the same ticket fairly. If each leg is a genuine coin flip, all three win 12.50% of the time, which is fair odds of +700 and an $80.00 payout on $10. The sportsbook pays $69.58. The $10.42 difference is the vig from three separate bets multiplied together.
How the vig grows with each added leg
A single -110 bet on a true 50% outcome loses 4.55% of the stake on average. Stack more coin-flip legs at -110 and the expected loss climbs: 2 legs pay +264 against a fair +300 (-8.88% expected value); 3 legs pay +596 against +700 (-13.03%); 4 legs pay +1228 against +1500 (-16.98%); 5 legs pay +2436 against +3100 (-20.75%); and 6 legs pay +4741 against +6300 (-24.36%).
The payout looks bigger with every leg, and it is, but the share of the stake the book expects to keep grows faster. A parlay wins money on average only when the combined chance of every leg hitting beats the parlay’s implied probability. Two -110 legs imply 27.44%; two legs you rate at 55% each combine to 30.25%, worth about +10.25% per dollar staked. Two genuine coin flips combine to 25.00% and lose 8.88%. That is why parlays are one of the most profitable products a sportsbook offers.
Mixing favorites and underdogs on one ticket
Prices do not need to match. A -150 favorite (decimal 1.6667), a +130 underdog (2.30) and a -110 side (1.9091) multiply to 7.3182, or +632, with 13.66% implied probability. A $25 ticket pays $182.95, of which $157.95 is profit. The order you add the legs in never changes the result, because multiplication does not depend on order.
Pushes, voids and correlated legs
At most US sportsbooks a leg that pushes or is voided drops out and the parlay is repriced on the remaining legs. A three-leg -110 ticket with one push becomes a two-leg +264 parlay, so the $10 ticket pays $36.45 instead of $69.58. Check the house rules, because some books grade a pushed parlay differently.
The multiplication assumes the legs are independent. A team covering the spread and the game going over can be related, so same-game parlays are priced with the book’s own correlation adjustment and will not match a simple product. Use this calculator for parlays across different games, and treat a same-game quote as the book’s own number.
Parlay calculator questions
How are parlay odds calculated?
Convert every leg to decimal odds and multiply them together. The product is the parlay’s decimal price; subtract 1 and multiply by the stake to get the profit.
What does a three-leg parlay at -110 pay?
About +596. A $100 ticket pays $695.79 in total, or $595.79 in profit, if all three legs win.
Why does my sportsbook pay less than this calculator on a same-game parlay?
Same-game parlays combine related outcomes, and books reduce the price to account for that correlation. This calculator assumes independent legs.
What happens if one parlay leg pushes?
At most US sportsbooks the pushed leg drops out and the ticket is paid on the remaining legs at their combined odds. House rules vary, so check yours.
Can a parlay ever be a +EV bet?
Yes, when the product of your true win probabilities for the legs beats the parlay’s implied probability. Two -110 legs imply 27.44%, so legs at 60% and 51% (30.60% combined) are +EV even though the 51% leg loses on its own. With coin-flip legs the vig compounds and the expected loss grows with each leg.