A parlay calculator combines the odds of every selection in your bet into a single price, then shows the total payout and profit for a given stake. Because the odds multiply, a small stake can return a large payout, but every leg has to win.
Enter each leg in decimal, American, or fractional odds, add or remove legs as needed, and set your stake. The calculator returns the combined odds, the probability implied by that bookmaker price, the total payout, and your profit.
How to Use the Parlay Calculator
- 1Set the odds format, decimal, American, or fractional, to match your sportsbook.
- 2Enter each leg's odds and use Add leg for more selections. Remove any leg with the X button.
- 3Enter your stake, the single amount you are putting on the whole parlay.
- 4Read the payout, the combined odds, total return, and profit update as you type.
The Parlay Formula: A Worked Example
A parlay payout is the product of every leg's decimal odds, multiplied by your stake:
Combined odds
Combined odds = Odds 1 × Odds 2 × ... × Odds N
Example: 3-leg parlay
2.00 × 1.80 × 2.50 = 9.00 combined odds
A $10 stake returns 10 × 9.00 = $90.00, for an $80.00 profit. The combined price implies 11.1% before adjusting for bookmaker margin.
Why the odds compound
Each leg carries the book's margin. Three legs at a 5% margin each stack to roughly 15% priced against you, which is why a longer parlay is a worse bet per dollar than any single leg inside it.
Common Parlay Mistakes
- ✕Treating a same-game parlay as independent legs. Correlated legs are repriced by the book, so the real payout is usually lower than a straight multiplication. Use the book's quoted price for those.
- ✕Adding legs to chase a bigger number. Each price carries bookmaker margin, so adding legs compounds the margin in the combined price. The headline payout rises while the value per dollar usually falls.
- ✕Not shopping each leg. Taking the best available price on every leg compounds: a 2% better price on five legs is roughly 10% more payout for the same risk.
Frequently Asked Questions
How is a parlay payout calculated?
Convert every leg to decimal odds, multiply them together to get the combined odds, then multiply by your stake for the total payout. Profit is the payout minus your stake. Example: three legs at 2.00, 1.80 and 2.50 give combined odds of 9.00, so a $10 stake returns $90 for an $80 profit.
What is a parlay bet?
A parlay (also called an accumulator or acca) is a single bet that combines two or more selections. Every leg must win for the bet to pay out. Because the odds multiply, the potential payout grows quickly, but so does the chance of losing the whole stake to one failed leg.
Are parlays profitable?
Over the long run parlays are usually negative expected value. Each leg carries the bookmaker's margin, and that margin compounds with every leg you add, so a longer parlay is priced further below fair value than any single bet in it. The appeal is a large payout from a small stake, not a positive edge. The Vig Calculator shows how much margin each leg carries.
Can I mix odds formats in one parlay?
Enter every leg in the format you select at the top: decimal, American, or fractional. The calculator converts each leg to decimal internally before multiplying, so switching formats keeps the odds you already typed. To convert a single price by hand, use the Odds Converter.
Does this work for a same-game parlay?
This calculator multiplies the legs assuming they are independent. Same-game parlay legs are often correlated, so sportsbooks price them with an adjusted, usually lower, combined price rather than a straight multiplication. Use the sportsbook's own quoted price for a same-game parlay, and this tool for standard cross-game parlays.
How many legs can a parlay have?
Sportsbooks set their own limits, commonly between 10 and 25 legs, and also cap the maximum payout per bet. Adding more legs raises the headline odds but lowers the probability that every leg wins, so the realistic value falls as the leg count climbs.
Chasing guaranteed profit instead of a long-shot payout? The Surebet Calculator sizes stakes across bookmakers so you win regardless of the result.