Parlay Calculator
Calculate combined odds, potential payout, and profit for multi-leg parlays.
How Parlays Work
A parlay combines multiple individual bets into one wager. All legs must win for the parlay to pay out, but the potential return is much higher than placing each bet separately. The combined odds are calculated by multiplying the decimal odds of each leg together. While parlays offer attractive payouts, the implied probability of winning drops significantly with each added leg. For example, a 4-leg parlay of -110 bets has roughly a 6.25% chance of hitting. Use this calculator to understand the true risk-reward tradeoff before placing a parlay.
Frequently Asked Questions
How are parlay odds calculated?
Multiply the decimal odds of every leg, then convert back to American. A 4-leg parlay of -110 (1.91) bets pays out at +1283 (12.83 decimal).
Why is my parlay's true probability so low?
Probabilities multiply too. Four 50% bets have a 6.25% combined probability - and most parlays bet on heavy favorites where the legs are correlated, dropping the true probability further.
Are parlays ever +EV?
Rarely. Sportsbooks pay "true odds" on parlays (no extra hold per leg), but the leg correlation and accumulating vig usually make them -EV. The exception: same-game parlays priced from non-correlated picks at sharp books.
What's a teaser vs a parlay?
A teaser lets you adjust each leg's spread or total in your favor in exchange for lower odds. Calculate a teaser as a parlay using the adjusted lines.