A parlay is one bet made of two or more picks, called legs. Every leg has to win for the ticket to cash. Because the odds of each leg multiply together, a parlay pays more than the same picks bet one at a time, and it loses more often.
How a parlay works
You pick two or more outcomes and put them on one ticket. Each pick is a leg. If every leg wins, the parlay pays at the combined odds. If any leg loses, the whole ticket loses.
A two-leg parlay at -110 per leg pays about +264. The same two picks bet on their own pay about +91 each.
Leg 1: Road Dogs +3.5 (-110). Leg 2: Over 221.5 (-110). Combined odds: +264. A $10 stake returns $36.45 if both legs win.
How parlay odds are calculated
Turn each leg into decimal odds, then multiply them. -110 becomes 1.909. +150 becomes 2.50. Multiply all the decimals and you get the total return per dollar staked. Try it with the parlay odds calculator.
| Legs (all at -110) | Combined odds | Chance all hit at 52.4% each |
|---|---|---|
| 2 | +264 | 27.4% |
| 3 | +596 | 14.4% |
| 4 | +1228 | 7.5% |
| 5 | +2436 | 3.9% |
52.4% is the break-even rate for a -110 bet. The table shows how fast the hit rate falls as legs are added, even when every single leg is a coin flip plus the juice.
Why parlays carry more risk
Each leg is priced with the book's margin built in. On a parlay that margin stacks on every leg. More legs means a bigger payout, but also a much smaller chance of cashing and a bigger edge for the book.
- One loss sinks the ticket.
- The house edge compounds leg by leg.
- Long losing runs are normal, even with good reads.
What happens if a leg pushes
At most books, a push (a tie against the line) drops that leg and the parlay pays at the odds of the legs that are left. A three-leg parlay with one push becomes a two-leg parlay. Some books handle ties differently, so check the house rules.
Same game parlays and round robins
A same game parlay puts legs from one game on one ticket. Books price these differently because outcomes in the same game are linked. A round robin splits a set of picks into several smaller parlays, so one loss does not sink everything, though it costs more total stake.
How we treat parlays
Parlays are fun, and they are high variance. At Prolific Parlay, every parlay is sized small, logged and graded in public, win or lose. Read more on unit sizing.
Key takeaways
- A parlay is one ticket with two or more legs.
- Every leg has to win.
- Odds multiply, so payouts grow fast and the hit rate drops fast.
- Keep parlay stakes small.
Frequently asked questions
How many legs can a parlay have?
Most books allow from 2 legs up to a set maximum, often 10 or more. Every leg you add lowers the chance of cashing.
Is a parlay a good bet?
Parlays pay more, but the book's margin compounds on every leg. They fit best as small, fun stakes, not the core of a bankroll.
What does a 2-leg parlay at -110 pay?
About +264. A $10 stake returns about $36.45 if both legs win.
What happens if one leg of a parlay pushes?
At most books the leg is removed and the ticket pays at the reduced odds. House rules vary, so check your book.
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