Parlay calculator
Combined odds, payout, and profit for up to 8 legs - and the parlay's real expected value if you estimate each leg's true win probability.
Legs
American oddsHow parlay odds work
A parlay multiplies the decimal odds of every leg: two legs at -110 (1.91) combine to 1.91 × 1.91 = 3.65, about +265. Every leg must win. The payout grows fast because the probability of hitting all legs falls fast - and the book's hold compounds with every leg you add.
Why most parlays are -EV
If each -110 leg is truly a coin flip (50%), a two-leg parlay hits 25% of the time but pays like it hits 27.4% - the gap is the compounded vig. The only way a parlay is +EV is if the legs themselves are +EV. That's why this calculator accepts per-leg win probabilities: enter your true estimates and it shows the parlay's real expected value, not just the payout.
Finding +EV legs
Estimating true win probabilities is the hard part. Our EV board computes a market-consensus fair probability for every priced player prop across 16+ books and ranks the edges - the same numbers we track publicly on the results page.
Daily Results
Get one free +EV pick each day
The daily pick and its graded receipt, straight from the tracked board.
For analytics and education only. Lines move quickly; verify prices before making any paid decision.