About the Parlay Calculator
This parlay calculator multiplies the odds of every leg in an accumulator bet to show what the ticket pays if every selection wins. Enter each leg’s odds in American format (such as -110 or +150) or decimal format (such as 1.91 or 2.50), set your stake, and you get the total payout, net profit, the combined odds in both formats and the implied probability of hitting the parlay.
It is useful for sports bettors checking a sportsbook’s quoted parlay price, comparing a two-leg and a four-leg ticket, or understanding how quickly the chance of winning falls as legs are added. The leg-by-leg table shows how the payout compounds after each selection.
The calculation assumes every leg wins and ignores pushes, voids and ties, which most books handle by removing the leg and recalculating. Implied probability is taken straight from the odds and still includes the bookmaker’s margin, so the true chance of winning is usually lower. Gamble responsibly and only stake what you can afford to lose.
With the default inputs, the total payout is $69.58. Change any value above to recalculate instantly.
How to use the parlay calculator
- 1Enter the amount you plan to stake.
- 2Choose whether your odds are American or decimal.
- 3Type the odds for each leg, separated by commas.
- 4Read the total payout, profit and combined parlay odds.
- 5Check the implied probability to see how likely the ticket is to cash.
Formula and method
Each leg is first converted to decimal odds. Positive American odds become 1 + odds ÷ 100 (so +150 is 2.50) and negative American odds become 1 + 100 ÷ |odds| (so -110 is about 1.909). The parlay’s decimal odds are the product of every leg, because the winnings from one leg roll into the next.
Payout is the stake multiplied by the combined decimal odds, and profit subtracts the original stake. Implied probability is 1 ÷ D. Converting back to American: if D ≥ 2 the odds are +(D − 1) × 100, otherwise −100 ÷ (D − 1).
- dᵢ
- Decimal odds of leg i
- D
- Combined parlay decimal odds
- n
- Number of legs
Worked examples
$10 three-leg parlay at -110 each
Each -110 leg is 1.9091 in decimal. Multiplying three of them gives 6.958, so a $10 stake returns $69.58 — a $59.58 profit, roughly +596 in American odds. The implied chance of all three winning is about 14.4%.
$20 four-leg parlay with mixed odds
The legs convert to 2.50, 1.50, 2.20 and 1.9091. Their product is 15.75, so $20 pays $315 in total ($295 profit), which is +1475 in American odds with an implied probability of about 6.3%.
$5 five-leg decimal accumulator
Multiplying 1.8 × 2.1 × 1.5 × 3.0 × 1.95 gives combined odds of 33.17, so a $5 stake would return about $165.85. The odds imply only around a 3% chance that all five selections win.
Frequently asked questions
How is a parlay payout calculated?+
Convert each leg to decimal odds, multiply them together and multiply the result by your stake. For example, two legs at 2.00 each give 4.00, so a $10 bet pays $40 including your stake.
How much does a 3-leg parlay at -110 pay?+
Three -110 legs combine to decimal odds of about 6.96, or roughly +596. A $10 stake returns about $69.58, which is $59.58 profit.
What happens if one leg of a parlay pushes?+
Most sportsbooks drop a pushed or voided leg and recalculate the parlay with the remaining legs, so a three-leg ticket becomes a two-leg ticket. Check your book’s house rules, because some treat ties differently.
Why do parlays pay so much?+
Every leg must win, so the chance of success falls multiplicatively. The payout reflects that lower probability, but the bookmaker’s margin also compounds on every leg, which is why parlays usually carry a larger house edge than single bets.
Does implied probability show my real chance of winning?+
Not exactly. Implied probability comes directly from the offered odds, which include the sportsbook’s vig. Your true chance of winning is usually a little lower than the implied figure.