Parlay Calculator
Calculate the payout, implied probability, and break-even win rate of any parlay up to 15 legs. Enter each leg as American odds (-110, +250) or decimal (1.91, 3.50).
Parlay math, briefly
A parlay\'s decimal odds equal the product of each leg\'s decimal odds. A 4-leg parlay of -110 legs (decimal 1.91 each):
1.91 × 1.91 × 1.91 × 1.91 = 13.31 decimal ≈ +1231 American
The implied break-even win rate for that parlay is 1 / 13.31 ≈ 7.5%. If your true probability estimate exceeds 7.5%, the parlay has positive expected value.
When parlays make sense
- Bonus bet conversion — bonus bets only pay profit, so parlay leverage amplifies their value
- Correlated legs — combinations the book hasn\'t fully priced (e.g., Chiefs ML + Mahomes 250+ pass yards)
- Entertainment — small stakes for fun, fully expecting to lose
For everything else, straight bets beat parlays mathematically. See our parlay strategy guide.
Parlay Calculator FAQ
How is a parlay payout calculated?
Each leg's decimal odds multiply together, then the result multiplies by your stake. A 3-leg parlay of -110 legs (decimal 1.91 each) on $20 = 1.91 × 1.91 × 1.91 × $20 = $139.10 total return.
What's the maximum number of parlay legs in Kansas?
DraftKings and FanDuel allow up to 12 legs. BetMGM allows 15. Caesars allows 20. Fanatics allows 12. theScore Bet and bet365 cap at 15.
Are parlays profitable long-term?
Parlay compounding works against the bettor — the sportsbook's edge per leg multiplies. Most disciplined bettors avoid parlays except for entertainment, bonus-bet conversion, or specific correlated combinations the books haven't fully priced.