Parlay Calculator

Calculate combined odds, total payout, and implied probability for multi-leg parlays. Supports any odds format with up to 15 legs.

Parlay Legs (2)

#1
#2
$
Enter valid odds for all 2 legs to calculate parlay payout.

How Does a Parlay Work?

A parlay combines multiple bets into a single wager. All legs must win for the parlay to pay out. The combined odds equal the product of each leg's decimal odds, creating exponentially higher potential payouts as legs are added. A 2-leg parlay with each side at even odds (2.00) pays 4x. A 5-leg parlay at the same odds pays 32x.

How to Calculate Parlay Payouts

Convert each leg to decimal odds, multiply them together, then multiply by your stake. For example: Leg 1 at -110 (1.909), Leg 2 at +200 (3.00), Leg 3 at -150 (1.667). Combined: 1.909 x 3.00 x 1.667 = 9.54. A $100 stake pays $954 total. Use the odds converter to translate any format to decimal.

Should You Bet Parlays on Prediction Markets?

Prediction markets price each contract independently, so constructing a multi-contract parlay means managing separate positions. The upside is that prediction market prices typically carry less vig than traditional sportsbooks, which means your parlay edge erodes less per leg. Track live prices across platforms on the Odds Reference dashboard.

Frequently Asked Questions

How are parlay odds calculated?
Parlay odds are the product of all individual leg decimal odds. If leg 1 is 2.00 and leg 2 is 3.00, the combined parlay decimal odds are 6.00. A $100 bet at 6.00 pays $600 total ($500 profit). Every leg must win for the parlay to pay out.
What is the maximum number of legs in a parlay?
Most sportsbooks allow 10-15 legs per parlay, though some platforms permit more. This calculator supports up to 15 legs. Each additional leg multiplies the combined odds but also dramatically reduces the probability of winning.
Can I mix odds formats in a parlay?
Yes. Each leg in this calculator uses an independent odds input that auto-detects format. You can enter leg 1 as -110 (American), leg 2 as 2.50 (decimal), and leg 3 as 40¢ (prediction market cents). The calculator converts everything to decimal internally.
What is the implied probability of a parlay?
The implied probability of a parlay equals 1 divided by the combined decimal odds. A 3-leg parlay at combined odds of 10.00 has an implied probability of 10% (1/10). This means the parlay is expected to win roughly once every 10 attempts.
Are parlays a good bet?
Parlays amplify both the potential payout and the house edge. Each leg compounds the vig, so a 3-leg parlay at -110 lines carries roughly 13% total vig compared to ~4.5% on a single bet. Parlays are high-risk, high-reward and generally favor the sportsbook more than straight bets.
Do prediction markets offer parlays?
Most prediction market platforms like Kalshi and Polymarket do not offer built-in parlay functionality. However, you can manually construct a parlay by independently betting multiple contracts. Your combined payout is the product of individual contract returns, but you bear the risk of each position separately.
What is parlay ROI?
ROI (Return on Investment) measures profit relative to your stake. A $100 parlay that pays $500 has a 400% ROI ($400 profit / $100 stake). While parlays offer high ROI when they hit, their low win probability means long-term ROI is typically negative unless you have a consistent edge.
How does a same-game parlay differ from a standard parlay?
A same-game parlay (SGP) combines multiple bets from a single event, such as the winner and the over/under. Standard parlays combine bets from different events. SGPs have correlated legs, so the true probability differs from the independent product. Sportsbooks adjust SGP odds to account for correlation.

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