Odds toolkit
A parlay (also called a multi bet or accumulator) combines two or more individual selections into one bet that only pays out if every leg wins. The combined odds are the product of every leg's decimal odds multiplied together; your payout is your stake multiplied by the combined odds.
Combined odds = odds₁ × odds₂ × odds₃ × … × oddsₙ. Payout = stake × combined odds. Profit = payout − stake. Every leg must win for the parlay to pay out — one loss voids the entire bet.
Each additional leg multiplies your potential payout because you are compounding independent probabilities — but it also compounds your risk, since every single leg must win. A 3-leg parlay at $1.80, $2.10 and $1.65 combines to 1.80 × 2.10 × 1.65 = 6.24 (rounded), turning a $50 stake into a $311.85 potential payout — but if any one of the three legs loses, the entire $50 stake is lost.
This is why a parlay's combined odds are always longer than any single leg, and why the true probability of all legs winning together is lower than any individual leg's probability. Treat the combined price as reflecting genuinely lower odds of success, not a discount.
Adding a leg with odds above $1.00 always increases the combined odds and the potential payout — but it also multiplies the number of ways the bet can lose. Adding a heavily odds-on leg (e.g. $1.10) barely lifts the payout while still adding a full extra way to lose the whole bet. Before adding a leg, compare how much the combined odds actually move against how much additional risk that leg introduces relative to its own implied probability (see the Odds Converter above).
| Legs (decimal odds) | Combined odds | Payout | Profit |
|---|---|---|---|
| 1.91, 1.91 | 3.6481 | $182.41 | $132.41 |
| 1.80, 2.10, 1.65 | 6.2370 | $311.85 | $261.85 |
| 1.50, 1.50, 1.50, 1.50 | 5.0625 | $253.13 | $203.13 |
| 2.50, 3.00 | 7.50 | $375.00 | $325.00 |
| 1.33, 1.33, 1.33, 1.33, 1.33 | 3.1181 | $155.91 | $105.91 |
Multiply the decimal odds of all three legs together. For legs at $1.80, $2.10 and $1.65: 1.80 × 2.10 × 1.65 = 6.24 (rounded to 4 decimal places: 6.2370). Multiply that combined figure by your stake to get the payout.
The entire parlay is void and you lose your full stake — every leg must win for a standard parlay/multi bet to pay out. Some operators offer separate 'bet builder' or insurance products that soften this, but a standard parlay has no partial payout for a partial win.
Yes — each additional leg is another independent way for the whole bet to fail, even though the potential payout also grows. A 5-leg parlay at short odds-on prices can still have a lower probability of winning than a 2-leg parlay at longer prices; always check each leg's implied probability with the Odds Converter before combining them.
They are the same bet type under different regional names — 'parlay' (US), 'multi' (Australia), and 'accumulator' or 'acca' (UK) all describe combining multiple selections into a single bet that requires every leg to win.