Free Parlay Calculator
Calculate your parlay odds, potential payout, and win probability. Add up to 15 legs with American or decimal odds.
How to Use This Parlay Calculator
Enter your bet amount and the odds for each leg of your parlay. You can toggle between American and Decimal odds formats, and any existing values will convert automatically. Add up to 15 legs using the "Add Leg" button, and remove any leg with the X button.
Results update instantly as you type. The calculator shows your combined odds, total payout, profit, and the implied probability of all legs hitting. The per-leg breakdown table shows the implied probability of each individual selection.
How Parlays Work
A parlay combines multiple bets into a single wager. Every leg must win for the parlay to pay out. The odds of each leg are multiplied together, which is why parlays offer significantly higher payouts than individual straight bets.
The tradeoff is risk. A 3-leg parlay at -110 per leg has only about a 14.4% chance of hitting. That is roughly a 1-in-7 proposition. The potential payout on a $100 bet is approximately $596, which sounds attractive, but you will lose the full $100 six out of seven times on average.
If one leg of your parlay pushes (ties the spread exactly), most sportsbooks will remove that leg and recalculate the parlay with the remaining legs. A 4-leg parlay with one push becomes a 3-leg parlay.
Parlay Payout Chart
Payouts for a $100 bet with all legs at standard -110 juice:
| Legs | Combined Odds | Payout | Implied Prob |
|---|---|---|---|
| 2 | +264 | $364 | 27.5% |
| 3 | +596 | $696 | 14.4% |
| 4 | +1,228 | $1,328 | 7.5% |
| 5 | +2,435 | $2,535 | 3.9% |
| 6 | +4,741 | $4,841 | 2.1% |
| 8 | +17,517 | $17,617 | 0.6% |
| 10 | +64,261 | $64,361 | 0.2% |
Are Parlays Worth It?
Parlays are one of the most popular bet types in sports betting, and also one of the most profitable for sportsbooks. The mathematical edge compounds with each leg. On a standard -110 line, the book holds about a 4.5% margin. In a 4-leg parlay, that margin compounds to roughly 17%.
That does not mean you should never bet parlays. They are a legitimate way to get significant upside from a small stake. The key is understanding the math: treat parlays as entertainment bets with small unit sizes, not as a primary betting strategy. If you are using 1-2% of your bankroll on parlays, the entertainment value can be worth the negative expected value.
The exception is correlated parlays, where the outcomes are linked. For example, if you bet a team to win and the over to hit, those events are positively correlated. Some sharp bettors find edges in correlated parlays that sportsbooks misprice.
Parlay Strategies
Stick to 2-3 legs. The sweet spot for parlays is 2-3 legs. You get a meaningful payout boost (around +264 for two -110 legs) without cratering your hit rate. Every leg beyond 3 dramatically decreases your probability of winning.
Look for correlated legs. A same-game parlay where you take a team to win and the over to hit is correlated: if one hits, the other is more likely to hit. Not all correlations are priced correctly by the books, creating potential value.
Size your parlays appropriately. Treat parlay bets as high-risk plays. Use a fraction of your standard unit size. If your normal bet is 2 units, a parlay might warrant 0.25-0.5 units. This lets you enjoy the upside without threatening your bankroll.
Frequently Asked Questions
Related Tools & Guides
- Odds Converter — Convert odds formats before adding legs to your parlay.
- EV Calculator — Check each leg for positive expected value.
- Bankroll Calculator — Size your parlay bets relative to your bankroll.
- NFL Parlays Guide · NBA Parlays Guide · MLB Parlays Guide
- Parlays vs. Straight Bets: Which Is Smarter?
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