Parlay Calculator
Combine any number of legs to see combined American odds, decimal odds, payout, and implied win probability. Enter American odds like -110 or +150.
Leg 1
Leg 2
Leg 3
Combined odds
+702
Decimal
8.02
Payout
$801.82
Implied win %
12.47%
How a parlay works
A parlay combines multiple bets into one. Every leg must win for the ticket to cash. Combined odds are the product of each leg's decimal odds, which is why payouts scale quickly — and why true win probability drops just as fast.
Are parlays +EV?
Most standard parlays carry compounded juice, making them −EV on average. They can still be +EV when legs are correlated in your favor or when you're leveraging a book's parlay boost. Use this calculator alongside our no-vig fair-odds tool to spot the difference.