Parlay Calculator
Free parlay calculator — every odds format.
Add unlimited legs. See exact payout, implied probability, and the true +EV (or -EV) of any parlay before you place it.
How parlay math works
A parlay multiplies the decimal odds of every leg together. Three -110 legs (1.91 decimal each) give 6.96x — a $100 stake returns $696. The catch: implied probability also multiplies, and so does the sportsbook's vig.
Why most parlays lose money long-term
Every -110 leg carries ~4.5% vig. Stack five of them and you're giving up ~21% edge to the book before factoring in your handicapping. Parlae shows the true fair payout vs. what the book offers — the gap is what you're paying.
Same-game parlays (SGPs)
SGPs price correlated outcomes (QB passing yards + WR receiving yards) and books often misprice the correlation. Parlae's SGP analyzer estimates true correlation and flags overpriced or underpriced combos.
Frequently asked questions
How is a parlay payout calculated?
Convert each leg's American odds to decimal, multiply all decimals together, then multiply by your stake. Parlae handles every odds format automatically.
Are parlays +EV?
Standard parlays compound the sportsbook's vig on every leg — making them deeply -EV. Same-game parlays and correlated parlays can be +EV when legs are positively correlated, which Parlae flags.
What's the max number of legs I can add?
The calculator supports unlimited legs. Most US books cap parlays at 12–25 legs depending on sport.
Does the calculator handle pushes?
Yes — mark any leg as a push and Parlae recomputes the parlay at the reduced leg count, mirroring how every US book settles.