Parlay calculator — payout and the odds of collecting
Add legs, type a price into each. The payout and what it has to beat are both below — a parlay page that prints only the first is the misleading half of a true sentence.
- Profit if every leg wins
- $264.46
- Total returned
- $364.46
- Implied chance of collecting
- 27.4%
- Combined American odds
- +264
- Combined decimal odds
- 3.645
2 legs at these prices turns $100.00 into $364.46 if every one of them wins, which the combined price puts at 27.4%.
Each leg carries the book's margin, and a parlay multiplies them together — so the edge the book holds grows with every leg you add, at the same time as the payout does. How much cannot be read off one side of a market, so this page does not put a number on it.
Standard −110 parlays, on $100
| Legs | Returns on $100.00 | Implied chance of collecting |
|---|---|---|
| 2 | $364.46 | 27.4% |
| 3 | $695.79 | 14.4% |
| 4 | $1,328.33 | 7.5% |
| 5 | $2,535.91 | 3.9% |
| 6 | $4,841.27 | 2.1% |
| 7 | $9,242.43 | 1.1% |
| 8 | $17,644.64 | 0.6% |
| 10 | $64,308.16 | 0.2% |
The usual price on both sides of a spread or a total. Every added leg multiplies the payout and divides the chance.
How the maths works
Each leg is converted to decimal odds and the decimals are multiplied. Two legs at −110 are 1.909 × 1.909 = 3.645, so $100 returns $364.50 — not 1.909 + 1.909.
Every leg carries the book's margin, and multiplying the legs multiplies the margin with them. That is why a parlay's edge for the book grows with each leg while the payout grows too.
A pushed leg — a spread landing exactly on the number — usually drops out and the parlay pays as if it had one leg fewer. A lost leg ends the whole thing; there is no partial payout.
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