Parlay Betting Calculator
Combine multiple bet legs into one wager and instantly see your total parlay odds, potential payout, and profit. Perfect for sports bettors building same-game or multi-sport parlays.
About this calculator
A parlay bet links two or more individual wagers (called legs) into a single bet. To win, every leg must win. The combined decimal odds are calculated by multiplying each leg's decimal odds together: Combined Odds = Leg 1 Odds × Leg 2 Odds × Leg 3 Odds. Your potential profit is then: Profit = Stake × (Leg 1 Odds × Leg 2 Odds × Leg 3 Odds) − Stake. Because all legs must win, parlays carry higher risk than single bets — but they also offer significantly larger payouts. The break-even win probability is 1 divided by the combined decimal odds, expressed as a percentage, which tells you how often your parlay needs to hit just to be profitable long-term.
How to use
Suppose you stake $50 on a 3-leg parlay with decimal odds of 2.00, 1.80, and 2.50. Step 1 — multiply the odds: 2.00 × 1.80 × 2.50 = 9.00. Step 2 — calculate gross payout: $50 × 9.00 = $450. Step 3 — subtract your stake to find profit: $450 − $50 = $400. So a $50 parlay returns $400 profit if all three legs win. The break-even probability is 1 / 9.00 = 11.1%, meaning your parlay must win more than 11.1% of the time to be profitable.
Frequently asked questions
How do parlay odds work and how are they calculated?
Parlay odds are calculated by multiplying the decimal odds of each individual leg together. For example, three legs at 2.00, 1.80, and 2.50 produce combined odds of 9.00. This multiplication reflects that each leg is an independent event and all must win for the parlay to pay out. American odds must first be converted to decimal odds before multiplying. The result is always higher than any single-leg odds, which is what makes parlays attractive but statistically challenging.
What is the difference between a parlay and a single bet in sports betting?
A single bet is placed on one outcome, and your return depends only on that event. A parlay combines two or more selections, and every leg must win for you to collect. Because the odds multiply together, parlays offer much larger potential returns from a small stake. However, the probability of winning decreases with each additional leg added. One losing leg voids the entire parlay, making them higher-risk than placing the same selections as separate single bets.
When does it make sense to place a parlay bet instead of separate single bets?
Parlays make the most mathematical sense when you believe multiple outcomes are correlated or when your bankroll is too small to make individual bets meaningful. They are also popular for entertainment value, turning a modest stake into a potentially life-changing payout. However, sportsbooks build a larger margin into parlays, so the expected value is typically lower than placing equivalent single bets. Sharp bettors generally prefer singles, while recreational bettors use parlays for high-reward, low-stake entertainment.