What Is a Parlay? The Complete Guide to Parlay Betting

What Is a Parlay Bet?

A parlay is a single wager that combines multiple bets—called "legs"—into one ticket. Here's the key: every leg must win for the parlay to pay out. If even one leg loses, the entire bet loses and you get nothing back.

The upside is compelling: your payouts multiply. If you parlay two bets at -110 odds each, your payout is roughly 3.65× your stake. A three-leg parlay pays about 7×. A five-leg parlay pays about 25×. It's a small bet with a big potential reward—which is why parlays are so popular, especially among recreational bettors.

The downside, which we'll explore later, is that the sportsbook's edge compounds with each leg. A parlay is not a shortcut to consistent profits; it's entertainment with a hidden tax.

How Parlays Work: The Chain Concept

Think of a parlay as a chain. Each link must hold for the whole chain to work.

Let's say you pick three games:

• Leg 1: Chiefs -3 (-110)
• Leg 2: Over 44.5 points (-110)
• Leg 3: Lakers ML (+150)

All three must hit for your parlay to win. If the Chiefs cover, and the total goes over, but the Lakers lose—your entire parlay is gone.

Your original stake rides forward on each leg. If Leg 1 wins, your stake plus its winnings go into Leg 2. If Leg 2 wins, that new total goes into Leg 3. It's a compounding chain. If any link breaks, the whole chain fails.

How a 3-Leg Parlay Works — Visual

In this scenario, the first two legs win, but the Lakers lose. The entire parlay loses.

When all three legs win, your parlay hits and payouts multiply across the chain.

The Math Behind Parlay Odds

Parlay payouts are based on a simple formula. Here's how to calculate them:

Step 1: Convert American Odds to Decimal

For positive odds: (odds ÷ 100) + 1

For negative odds: (100 ÷ |odds|) + 1

Examples:

• +150 → (150 ÷ 100) + 1 = 2.50
• -110 → (100 ÷ 110) + 1 = 1.909
• -200 → (100 ÷ 200) + 1 = 1.50

Step 2: Multiply All Decimal Odds Together

This gives you your parlay multiplier.

Step 3: Multiply by Your Stake

Payout = Stake × Multiplier

Real Example

Parlay Payout Chart: 2 to 10 Legs

Here's a reference table for parlays where all legs are at -110 (standard sportsbook juice). These are approximate payouts:

*All legs at -110 (standard juice). Actual odds vary by leg. Probability assumes 52.38% win rate per leg (true implied odds at -110).

Risk vs. Reward: The Inverse Relationship

As legs increase, winning probability drops exponentially while payout multiplies.

Types of Parlays

Traditional Parlay

The simplest and most common type. You pick multiple games (usually 2-10), combine them on a single ticket, and every leg must win. Each sportsbook may have limits on legs and which sports/events can be parlayed together.

Same Game Parlay (SGP)

You combine multiple bets from a single game into one parlay. For example, in an NFL game, you might parlay:

• Team moneyline
• A specific player prop (e.g., over 100 rushing yards)
• Game total (over/under)

Same game parlays are extremely popular on DraftKings, FanDuel, and other sportsbooks. The advantage is that these bets often correlate—if a team is winning big, the total is more likely to go over. The disadvantage is that sportsbooks build in tighter juice on SGPs to account for correlation.

Round Robin

Instead of one big parlay, a round robin automatically creates all possible parlay combinations from your picks. For example, with 4 picks (A, B, C, D), a round robin creates six 2-leg parlays: AB, AC, AD, BC, BD, CD.

You win if at least some combinations hit. It's less risky than one big parlay, but payouts are lower. Many bettors use round robins as a middle ground between straight bets and traditional parlays.

Teaser Parlay

You move the spread in your favor on each leg, but the catch is that all legs still must hit to win. For example, you might parlay two games where you adjust the spreads by 6 points in your favor. Your winning probability on each leg goes up, but so does your payout requirement.

Teasers trade parlay odds for better individual leg odds. Most experienced bettors avoid them—you're essentially paying a heavy juice for worse odds overall.

Same Game Parlays Explained

Same game parlays have become the most popular parlay type. Let's visualize what one looks like:

Same game parlays combine multiple bets from a single game. All legs must win for the parlay to pay.

Parlay Strategy: When to Bet Parlays

Parlays are tempting, but sharp bettors use them sparingly. Here's when they make sense:

Keep It Short (2-3 Legs Max)

A 2-leg parlay at -110 has roughly 27% winning probability and a house edge of about 10%. A 3-leg parlay has about 14% probability and a 15% house edge. Beyond 3 legs, the math becomes brutal for the bettor.

Look for Correlation

The best parlays involve correlated legs. For example, if a team is winning big, the total is likely to go over. Or if a star player has 250+ passing yards, the team is more likely to cover the spread. Correlation can actually give you an edge.

Avoid uncorrelated 6+ leg parlays where you're just hoping random games all hit. That's entertainment, not investing.

Use Hedging When Appropriate

If your first two legs of a 3-leg parlay hit, you now have real profit locked in. Consider using our hedge calculator to lock in some profit on the final leg, rather than letting it all ride. Learn more in our guide on hedging parlay strategy.

The House Edge on Parlays

This is the critical part that separates sharp bettors from casual ones. Sportsbooks don't just love parlays—they're built to make you lose.

Here's why: each individual leg at -110 contains about 4.55% juice (house edge). When you parlay legs together, that juice compounds.

• 2-leg parlay at -110: ~10% house edge
• 3-leg parlay at -110: ~15% house edge
• 5-leg parlay at -110: ~20% house edge
• 10-leg parlay at -110: ~35% house edge

This means that long-term, a 10-leg parlay is one of the worst bets you can make. The sportsbook has a 35% edge. You'd need to win 54% of the time just to break even—impossible at those odds.

Check the true no-vig odds of your picks using our no-vig calculator. If the combined true probability is lower than the implied probability of your parlay, you're making a negative EV bet.

Parlays vs. Straight Bets: When Each Makes Sense

When to Bet Straight

If you care about long-term profit, bankroll management, and risk mitigation, stick to straight bets. Most professional bettors use straight bets 95% of the time. You compound your edge over thousands of bets, not thousands of dollars on one ticket.

When to Bet Parlays

Parlays are best used for entertainment, or when you have genuinely correlated edges that you can identify. A 2-leg same-game parlay on correlated legs (team to win + total to go over) can have positive EV if the individual legs are positive EV.

Common Parlay Mistakes

1. Adding Legs "Because the Odds Look Better"

They don't. A 5-leg parlay paying 25:1 looks exciting, but you're betting against 20% house edge. Compare it to five separate straight bets at the same odds—the straight bets are far superior.

2. Betting 6+ Leg Parlays

The math gets exponentially worse. A 6-leg parlay at -110 has a true winning probability of about 2.1%, but the parlay only pays out 48:1. That's close to fair, but not quite—and you're hoping random unrelated games all hit.

3. Not Checking Line Value on Each Leg

Before you parlay anything, verify that each individual leg has positive expected value using our EV calculator. If even one leg is negative EV, the entire parlay is negative EV.

4. Ignoring That One Bad Leg Sinks Everything

The risk/reward is asymmetric. You win 2x or 7x or 25x if all legs hit. You win 0x if even one leg loses. That's not favorable for long-term wealth building.

5. Not Hedging When You Can Lock in Profit

If you're 2 legs deep on a 3-leg parlay and both have hit, you have real money on the line. Hedging the final leg can lock in profit. Use our hedge calculator to see if it makes sense.

Can You Parlay Prediction Markets?

Prediction markets like Polymarket don't have traditional "parlays," but you can create synthetic parlays by buying YES tokens on multiple independent events. The math is identical to traditional parlays.

For example, if you buy YES on three different Polymarket events at 60¢ each (implying 60% probability), your combined probability of winning all three is:

0.60 × 0.60 × 0.60 = 0.216 = 21.6%

Your payout would be 1÷0.216 = 4.63:1 on your total stake (minus fees). Learn more about how prediction markets work and whether Polymarket is legal in your jurisdiction.

The Bottom Line

Parlays are fun. The payouts are exciting. But the mathematics of parlays heavily favors the sportsbook. Each leg you add increases the house edge exponentially. By a 10-leg parlay, the sportsbook has a 35% edge.

If you're going to parlay, keep these rules in mind:

• Limit to 2-3 legs maximum
• Ensure each leg has positive expected value
• Look for correlation between legs
• Consider hedging when you lock in profit
• Use same-game parlays when the correlation is natural
• Never treat a parlay as an investment strategy

Our free tools—the odds converter, EV calculator, and hedge calculator—can help you make smarter parlay decisions.

Frequently Asked Questions