Even if you pick 4 out of 5 games correctly and one leg fails, the whole parlay results in a loss. To win a parlay, all your selections must be correct. Parlays are an exciting way to bet and can lead to massive winnings from a small stake. The risk in parlay betting is higher, but so is the potential payout. But not anymore - our free parlay calculator makes it a breeze to determine the possible winnings for your parlay wager. Calculating potential parlay payouts manually used to be frustrating and time-consuming. Again… we recommend staying away from these. They are so attractive due to the fact that you can bet a little to win a lot. The downside is that the risk also increases with each added bet. The more bets you include, the higher the potential payout. You need to win all the wagers in the parlay to win the bet. A parlay is a single bet that links two or more individual wagers together. Even though we recommend that beginners stay away from them, they can be captivating. Ever seen someone hit a huge sports betting winner? Chances are it was a parlay bet.