Parlay Calculator: Combined Odds, Payout and Implied Probability
Enter each leg's American odds and your stake to see what the parlay pays and how often every leg has to hit at those prices.
2 legs: every one has to hit. These prices imply every leg hits 27.4% of the time, about 1 in 4.
Before you place it, check every leg's last-10 and last-5 hit rate with the free parlay checker →
How parlay odds are calculated
A parlay only cashes if every leg wins, so the prices multiply. Convert each leg to decimal odds, multiply them together, and that product is the parlay's decimal price. Your payout is stake × that price, stake included.
The implied probability works the same way: multiply each leg's implied probability. Two legs at -110 are each 52.4%, and together 27.4%. Add a third at -110 and it drops to 14.4%.
Books may price same-game parlays differently from the straight multiplication, because the legs can be related. The number here is the plain math on the prices you enter, so check the price on your slip before you place anything.
The odds tell you what a parlay pays. The parlay checker shows how often each player actually cleared that line in their last 10 and last 5 games.
Learn the math
Questions
How are parlay odds calculated?
Convert each leg to decimal odds and multiply them. Two legs at -110 are 1.909 × 1.909 = 3.64 in decimal, which is about +264 in American odds. A $10 parlay at 3.64 returns $36.45, stake included.
What is the implied probability of a parlay?
It is 1 divided by the combined decimal odds, which is the same as multiplying each leg's implied probability. Two -110 legs are 52.4% × 52.4% = 27.4%. Each leg you add lowers the chance every leg hits.
Does a one-leg parlay change the odds?
No. A one-leg parlay is just a straight bet at that leg's price.
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Math only: these calculators work out what a price implies. They don't predict results. DARIMARKET is research, not a sportsbook. 21+ only, and only where legal. If it stops being fun, call or text 1-800-MY-RESET (1-800-697-3738).