Calculate your parlay payout, potential profit, and implied win probability for sports betting. Add up to 8 legs using American odds (e.g., -110, +150) or decimal odds (e.g., 1.91, 2.50). Enter your wager to see exact returns.
Parlay Calculator
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Total Payout (wager + profit)
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Potential Profit
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Parlay Decimal Odds
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Implied Win Probability
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Number of Legs
What Is a Parlay Bet?
A parlay combines two or more individual bets (legs) into a single wager. All legs must win for the parlay to pay out. The odds multiply together, creating potentially large payouts — but the more legs, the lower the probability of winning.
Most experienced bettors keep parlays to 2–4 legs. While more legs increase potential payouts, the probability of winning drops dramatically with each additional leg. A 4-leg parlay where each leg has 50% win probability only has a 6.25% chance of winning (0.5^4).
What does -110 mean in American odds?+
-110 means you must wager $110 to win $100 profit. Negative American odds always indicate the favorite. The "vig" or sportsbook margin is built into the odds — standard -110 on both sides of a game implies a ~4.5% house edge.
What does +150 mean?+
+150 means a $100 wager wins $150 profit (total payout $250). Positive American odds always indicate the underdog. Higher positive numbers mean bigger potential payouts but lower implied win probability.
How do you calculate a parlay payout?+
Convert each leg to decimal odds, multiply all together for the parlay multiplier, then multiply by your wager. Example: two -110 legs = 1.909 × 1.909 = 3.645 multiplier. A $100 wager pays $364.50 total ($264.50 profit).
What is implied probability in a parlay?+
Implied probability is 1 ÷ combined decimal odds × 100. It shows the break-even win rate you need long-term. A 3-leg parlay of -110 favorites has only a ~12.5% implied win probability — meaning you need to win 1 in 8 times just to break even.
What is a same-game parlay?+
A same-game parlay (SGP) combines multiple bets from the same game — like moneyline + spread + total. Because the legs are correlated, sportsbooks adjust the odds (usually lower than a standard parlay). Use our calculator to compare SGP odds against standard parlay odds.
Are parlays good bets?+
Parlays have a much higher house edge than single-game bets. A standard 2-leg -110/-110 parlay pays +260 but the fair value is +305 — the sportsbook keeps a ~10% edge. They're high-variance entertainment bets, not long-term value plays. Bet responsibly.