Parlay Calculator
Add each leg's American odds and your stake. The calculator multiplies the decimal equivalents to produce combined odds, implied probability, and total payout. Add up to 12 legs.
Combined Odds (American) —
Implied Probability —
Total Return —
How parlay payouts work
Each leg's decimal odds are multiplied together. A 3-leg parlay at −110, +130, and −150 equals 1.91 × 2.30 × 1.67 ≈ 7.34. A $20 stake at 7.34 returns about $146.80, including stake.
Each added leg roughly doubles the potential payout — but also halves your chance of winning. The math compounds rapidly: a 5-leg parlay at −110 each pays roughly +2280 but cashes only about 4% of the time.
Three smart parlay habits
- Cap at 2-4 legs. Beyond that, the house edge compounds against you sharply.
- Avoid stacking heavy favorites. A four-team −300 parlay barely moves the payout while compounding losing risk.
- Use parlay insurance promos. Many Missouri sportsbooks refund parlays that lose by one leg — claim those when available.