How are parlay odds calculated?

Multiply all decimal odds together. For example, three selections at 1.80, 2.00, and 1.50: 1.80 x 2.00 x 1.50 = 5.40 total odds. A $10 bet returns $54. For American odds, convert to decimal first, multiply, then convert back if needed.

Are parlays a good betting strategy?

Mathematically, parlays have lower expected value than straight bets because you're paying margin on every selection, and those margins multiply. A 5-leg parlay at books with 5% margin effectively pays 77% of fair value. However, they can be valuable for recreational entertainment or correlated parlays where legs aren't truly independent.

What is the maximum number of legs in a parlay?

Most sportsbooks allow 10-15 selections per parlay, though some permit up to 20-25. Very large parlays (10+ legs) have extremely low probability of winning—typically under 0.1%—and are essentially lottery tickets.

What happens if one leg of my parlay pushes?

In most sportsbooks, a push (tie) removes that leg from the parlay and recalculates at reduced odds. A 5-leg parlay with one push becomes a 4-leg parlay. Some books void the entire parlay on a push, so check terms carefully.

Parlay - Betting | ToolsGambling

Parlay

A parlay combines multiple bets into one, multiplying the odds for potentially huge payouts. All legs must win—one loss and the entire bet loses. It's the high-risk, high-reward bet type that turns $10 into $1,000 on a good day. Parlays are the most popular bet type among recreational bettors and the most profitable for sportsbooks.

How Parlays Work
Calculating Parlay Odds
Parlay Math
Types of Parlays
Parlay Strategy
When Parlays Make Sense
Common Mistakes

How Parlays Work {#how-parlays-work}

A parlay links multiple selections together. Every selection must win for the parlay to pay out.

Simple Example

Individual bets:

Game 1: Lakers -3.5 at 1.91
Game 2: Celtics ML at 1.75
Game 3: Over 215.5 at 1.87

As a parlay: Combined odds: 1.91 × 1.75 × 1.87 = 6.25

$10 stake returns $62.50 if all three win.

Win Conditions

Scenario	Leg 1	Leg 2	Leg 3	Parlay Result
All win	Win	Win	Win	WIN
One loss	Win	Loss	Win	LOSE
Two losses	Loss	Loss	Win	LOSE
One push	Win	Push	Win	Reduced payout

One loss = entire bet lost. This is why parlays are risky.

Calculating Parlay Odds {#calculation}

Decimal Odds Method

Simply multiply all decimal odds:

\text{Parlay Odds} = \text{Odds}_1 \times \text{Odds}_2 \times \text{Odds}_3 \times ... \times \text{Odds}_n

Example: 4-leg parlay

Selection 1: 1.80
Selection 2: 2.10
Selection 3: 1.65
Selection 4: 1.90

\text{Parlay Odds} = 1.80 \times 2.10 \times 1.65 \times 1.90 = 11.85

$10 bet wins $118.50 total ($108.50 profit).

American Odds Conversion

First convert to decimal:

American	Decimal
-110	1.91
+150	2.50
-200	1.50
+200	3.00

Formula:

Positive American: (American / 100) + 1
Negative American: (100 / |American|) + 1

Parlay Payout Table

Standard -110 odds legs:

Legs	Combined Odds	$10 Payout	Win Probability*
2	3.65	$36.50	27.4%
3	6.97	$69.70	14.3%
4	13.31	$133.10	7.5%
5	25.41	$254.10	3.9%
6	48.53	$485.30	2.1%
8	176.86	$1,768.60	0.6%
10	644.26	$6,442.60	0.15%

*Assuming 50% win rate per leg

Parlay Math {#parlay-math}

Expected Value Formula

\text{EV} = (\text{Win Prob} \times \text{Payout}) - \text{Stake}

Example: 3-leg parlay at 6.97 odds

Win probability (50% each leg): 0.5³ = 12.5%
Fair odds at 12.5%: 8.00
Actual odds: 6.97
EV: (0.125 × $69.70) - $10 = -$1.29 per $10 bet

The Margin Problem

Every leg includes bookmaker margin, and margins multiply:

\text{Effective Parlay Margin} = (1 + \text{Margin per leg})^n - 1

Legs	5% Margin per Leg	Effective Total Margin
2	5%	10.25%
3	5%	15.76%
4	5%	21.55%
5	5%	27.63%
10	5%	62.89%

A 10-leg parlay with 5% margin pays only 37% of fair value.

Break-Even Win Rates

How often you need to win to break even:

Parlay Type	At Fair Odds	At -110 Odds
2-leg	25.0%	27.4%
3-leg	12.5%	14.3%
4-leg	6.25%	7.5%
5-leg	3.13%	3.9%

You need to outperform break-even consistently to profit.

Types of Parlays {#types}

Standard Parlay

All legs independent, all must win. Most common type.

Teaser

Parlay with adjusted point spreads in your favor:

NFL 6-point teaser example:

Original: Chiefs -7.5 becomes Chiefs -1.5
Original: Ravens +3 becomes Ravens +9

Trade-off: Lower odds for easier wins.

Teaser Points	2-Team Odds	3-Team Odds
6 points	1.91	1.67
6.5 points	1.83	1.59
7 points	1.77	1.50

Pleaser (Reverse Teaser)

Point spreads move against you for higher odds.

Example:

Chiefs -7.5 becomes Chiefs -13.5
Much higher odds, much lower probability

Same-Game Parlay (SGP)

Multiple bets from the same event:

Team to win
Player over 25 points
Total over 220

Warning: Same-game parlays are often correlated—if the team wins in a high-scoring game, the player over is more likely. Bookmakers price this correlation in, often unfavorably.

Info

Did you know? You can sometimes parlay rare prop bets like an Octopus (8 points by one player) with the moneyline for massive odds.

Round Robin

Multiple parlays from a selection of games:

Select 4 games
Generates all possible 2-leg parlays (6 bets)
Or all 3-leg combinations (4 bets)

Provides coverage against one loss.

Parlay Strategy {#strategy}

Strategy 1: Limit Leg Count

Legs	Risk Level	Recommendation
2	Low	Acceptable
3-4	Moderate	Use sparingly
5-6	High	Entertainment only
7+	Very high	Avoid (lottery ticket)

Strategy 2: Use Positive EV Legs Only

If each leg is +EV, the parlay can be +EV:

Example: Three +3% edge bets

Individual EV: +3% each
Combined probability boost compounds

Only parlay bets you'd make individually.

Strategy 3: Correlated Parlays

Find legs that are positively correlated:

Correlated (Good)	Uncorrelated (Neutral)
Team wins + Over	Team A wins + Team B wins
RB scores + Team covers	Total points + Player assists
Rain + Under	Weather + Spread

Warning: Most same-game parlays are priced to eliminate correlation value.

Strategy 4: Shop Lines

Different books offer different parlay odds:

Bookmaker	3-Leg Parlay (-110 legs)
Book A	6.00
Book B	6.50
Book C	6.97

8% difference on identical selections.

Strategy 5: Use Parlay Insurance

Some books offer "one-leg insurance" on 4+ leg parlays:

If exactly one leg loses, refund as free bet
Changes the math significantly

\text{Insurance Value} = P(\text{exactly 1 loss}) \times \text{Stake} \times \text{Free Bet Conversion}

When Parlays Make Sense {#when-to-parlay}

Good Reasons to Parlay

Reason	Explanation
Correlation exists	Legs are positively linked
Entertainment value	Small stake for excitement
Circumvent limits	Combine limited bets
Maximize promotions	Parlay boosts/insurance
All legs are +EV	Each selection has edge

Bad Reasons to Parlay

Reason	Why It's Wrong
"Locks" to win	No bet is certain
Bigger potential payout	Higher payout = higher risk
Following tipsters	Their parlays have same -EV
Chase losses	Parlays won't recover losses