Parlay calculator
Multiply several legs into one combined price, gross payout and net profit, with the independence assumption stated.
Leg 1
Optional. Fill every leg to see a combined probability.
Leg 2
Optional. Fill every leg to see a combined probability.
Leg 3
Optional. Fill every leg to see a combined probability.
Leg 4
Optional. Fill every leg to see a combined probability.
Leg 5
Optional. Fill every leg to see a combined probability.
Leg 6
Optional. Fill every leg to see a combined probability.
Combined price
Multiplying the legs assumes they are independent. Legs from the same game, the same player or the same market are usually correlated, so the real combined probability can be far from the product. This calculator does not price that dependence, and it does not know your legs.
How it is calculatedOpenClose
The combined decimal return is the product of every leg's decimal return. Gross payout is the stake times that product, and net profit is the gross payout minus the stake. A combined win probability is the product of the legs' probabilities only if the legs are independent.
- The combined decimal return is the product of the legs. That part is exact arithmetic and holds whatever the legs are.
- The combined probability is the product of the leg probabilities ONLY if the legs are independent. Legs from one game, one player or one market usually are not.
- No correlation input is offered here, because a number that pretends to price dependence without knowing your legs would be worse than none.
Worked example, illustrative
Two legs at -110
- 1Each leg returns 1.9091, so the parlay returns 3.6446 per unit, which is +264 in American odds.
- 2A 100 stake returns 364.46 gross and 264.46 in profit.
- 3With a 50% estimate on each independent leg, the combined win probability would be 25.00%.
These figures are an illustration of the formula, not a claim about any real market.
Related guidance
Research only. This tool does arithmetic on numbers you type. It does not place bets, submit entries, estimate a probability for you, or tell you what to risk. If gambling stops being fun, call 1-800-GAMBLER.