Parlay Calculator
How To Use This Calculator
The parlay calculator computes your combined odds, total payout, and profit for multi-leg parlays. Add as many legs as you need and see results update in real-time.
Input the total amount you want to wager on the parlay.
Enter the odds for each selection in your parlay. Use the + button to add more legs.
See combined odds, payout, profit, and implied probability instantly.
What is a Parlay Bet?
A parlay bet (also known as an accumulator or combo bet) combines two or more individual wagers into a single bet. All legs must win for the parlay to pay out.
The appeal of parlays is the multiplied odds -- each leg increases the potential payout exponentially. However, the probability of winning decreases with each added leg, making parlays inherently riskier than straight bets.
Combined Odds = Leg1 x Leg2 x ... x LegNParlay Payout Reference (Even Odds)
How payouts scale with each additional leg at even odds (2.00 decimal / +100 American) on a $100 stake.
| Legs | Combined Odds | Payout | Profit | Win Prob. |
|---|---|---|---|---|
| 2 | 4.00 | $400 | $300 | 25.00% |
| 3 | 8.00 | $800 | $700 | 12.50% |
| 4 | 16.00 | $1,600 | $1,500 | 6.25% |
| 5 | 32.00 | $3,200 | $3,100 | 3.13% |
| 6 | 64.00 | $6,400 | $6,300 | 1.56% |
| 7 | 128.00 | $12,800 | $12,700 | 0.78% |
| 8 | 256.00 | $25,600 | $25,500 | 0.39% |
Common Mistakes to Avoid
Adding more legs increases potential payout but the probability of winning drops exponentially. A 6+ leg parlay at even odds has less than a 2% chance of winning. Stick to 2-3 legs for realistic win rates.
Correlated legs (where one outcome affects another) change the true probability of your parlay. Sportsbooks price legs independently, so correlated parlays can sometimes be +EV -- but most books restrict them.
Different sportsbooks offer different odds on the same events. Even small differences in leg odds compound across a parlay, significantly affecting your payout. Always shop for the best odds on each leg.
Many recreational bettors throw small amounts at large parlays hoping for a big payout. Over time, this approach has a significant negative expected value. Treat each leg as a serious betting decision.
Frequently Asked Questions
What is the difference between a parlay and an accumulator?
They are the same thing. "Parlay" is the North American term, while "accumulator" (or "acca") is used in the UK and Europe. Both combine multiple selections into a single bet where all legs must win.
How many legs should I include in a parlay?
For serious bettors, 2-3 legs is optimal. Each additional leg dramatically reduces your win probability. A 2-leg parlay at -110 odds each has about a 25% win rate, while a 5-leg parlay drops to about 3%.
Can parlays be profitable long-term?
Parlays can be profitable if each leg has positive expected value (+EV). If you consistently identify +EV selections, combining them into small parlays amplifies your edge. However, parlays with -EV legs compound the house advantage against you.
What happens if one leg of my parlay pushes?
If a leg pushes (ties), most sportsbooks remove that leg from the parlay and recalculate the payout with the remaining legs. For example, a 3-leg parlay with one push becomes a 2-leg parlay.
Do sportsbooks offer parlay bonuses?
Many sportsbooks offer parlay profit boosts (e.g., +25% on 4-leg parlays). While these boosts can add value, read the terms carefully. Some exclude certain markets or cap the boosted payout. Factor in the boost when evaluating your expected value.
What are same game parlays (SGPs)?
Same game parlays combine multiple bets from a single event (e.g., player props + game total + moneyline). Because outcomes within the same game can be correlated, sportsbooks use proprietary models to price SGPs, often with higher margins than traditional parlays.
How do I calculate parlay odds with American odds?
Convert each American odds leg to decimal first. For positive odds: (odds / 100) + 1. For negative odds: (100 / |odds|) + 1. Then multiply all decimal odds together for combined parlay odds. This calculator handles the conversion automatically.
Pro Tip: Use +EV Legs Only
The only way to make parlays profitable long-term is to ensure each leg has positive expected value. Use our EV Calculator to verify each selection before adding it to your parlay. Combining +EV legs multiplies your edge, while -EV legs compound the house advantage.