Parlay Bet Calculator
Calculate the combined payout and net profit of a multi-leg parlay bet in seconds. Use it when combining 2 or more selections to see your true risk-reward before placing the wager.
About this calculator
A parlay (or accumulator) multiplies the decimal odds of each individual selection together to produce a combined odds figure. The formula for net profit is: Profit = stake × (leg1Odds × leg2Odds × leg3Odds) − stake. The total return including stake is: Return = stake × (leg1Odds × leg2Odds × leg3Odds). Each leg must win for the parlay to pay; a single loss voids the entire bet (unless the sportsbook offers 'push' rules). Because probabilities multiply — if each leg has a 50% chance, three legs together have only a 12.5% chance — parlays carry much higher variance than single bets. The implied win probability of the parlay is: P_parlay = (1 / combinedOdds) × 100. Bookmakers also typically embed extra margin into parlay payouts, meaning the true expected value is lower than individual bets placed separately.
How to use
Example: You stake $20 on a 3-leg parlay. Leg 1 odds: 1.90, Leg 2 odds: 2.10, Leg 3 odds: 1.75. Step 1: Multiply the odds — 1.90 × 2.10 × 1.75 = 6.9825. Step 2: Calculate total return — $20 × 6.9825 = $139.65. Step 3: Net profit = $139.65 − $20 = $119.65. Step 4: Implied win probability = (1 / 6.9825) × 100 ≈ 14.3%. Your $20 bet can return nearly $140 but requires all three legs to win.
Frequently asked questions
How does adding more legs to a parlay affect the payout and probability of winning?
Each additional leg multiplies the combined odds, increasing the potential payout substantially. However, it simultaneously multiplies the difficulty of winning — the parlay probability equals the product of each individual leg's win probability. For example, four 60%-probability legs produce a combined win chance of only 0.6⁴ = 12.96%. The dramatic growth in payout often masks the equally dramatic collapse in win probability, which is why parlays are high-variance bets. They can be strategically useful when you have correlated picks, but as pure EV plays they are typically worse than single bets.
What happens to a parlay if one leg is a push or void?
Most major sportsbooks 'reduce the parlay' when a leg pushes (ties) or is cancelled — meaning that leg is removed and the payout recalculates as if the parlay had one fewer leg. So a 3-leg parlay with one push pays out as a 2-leg parlay. Some books treat a push as a loss, so always check house rules before placing. In this calculator, any voided leg should simply be removed from the calculation and the remaining legs re-entered to reflect the adjusted payout.
Why do sportsbooks offer worse value on parlays than on equivalent single bets?
When you place individual single bets, each one is priced with its own margin (the vig). In a parlay, those margins compound with every leg added, meaning the bookmaker's edge grows multiplicatively rather than just additively. The 'true' combined odds you should receive equal the product of fair odds, but the book pays you the product of already-discounted odds. Studies show that a typical 3-leg parlay carries an effective house edge of 12–25% versus 4–8% for singles. Parlays can still be appealing for entertainment or when you identify genuine correlated edges, but they are rarely positive-EV bets.