Model │ Math · Free tool
Parlay Calculator
A parlay folds several bets into one. Every leg has to land. The odds multiply into a tempting number. So does the margin. Price the whole ticket, and see what it really costs.
Enter a price in any format, +120, 1.91 or 10/11.
Enter a price in any format, +120, 1.91 or 10/11.
Enter a price in any format, +120, 1.91 or 10/11.
A dollar amount greater than zero.
Two legs or more. Each leg takes a price in any odds format.
- Combined odds ,
- Profit ,
- Implied probability ,
- Legs priced ,
Why the big number costs more than it looks
Combine the legs and the decimal odds multiply, three modest prices become one eye-catching one. The probabilities multiply too, the other way: each leg you add makes the whole ticket less likely to land.
- Combined odds
- The product of every leg in decimal form. It climbs fast, which is exactly the appeal, and exactly the trap.
- Implied probability
- How often the full ticket lands if each leg is a coin-flip-fair price. Four even-money legs already sit near 6%, long odds you built yourself.
- The compounding margin
- Every leg carries its own vig, and a parlay multiplies them together. The hold on the combined bet is far steeper than on any single leg, the real reason books promote parlays so hard.
A parlay is not a way to turn small edges into a big one. Unless every leg is independently +EV, stacking them only multiplies the margin working against you.