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Parlay Calculator

Add legs, see the combined odds and payout. Works with American, decimal, or implied probability inputs.

$
1
2
Total Payout
$364
2-Leg Parlay+264
Parlay Odds
+264
american
Decimal Odds
3.64
multiplier
Win Probability
27.4%
implied (includes vig)
Profit
+$264
if parlay hits

Parlays compound the sportsbook's vig. A 2-leg parlay at -110 per leg carries ~8% total hold vs ~4.5% on straights. The more legs, the more vig you pay.

About the Parlay Calculator

A parlay combines multiple bets into one wager — every leg has to hit for the parlay to pay. Parlay odds compound multiplicatively: two -110 legs (each 52.4% implied) become a +264 parlay (27.5% implied). Every additional leg cuts your win probability and lengthens your odds.

Use this calculator to figure out what a parlay actually pays before you place it. The math also reveals why most parlays are -EV: the sportsbook stacks vig onto every leg, so the combined hold compounds.

Frequently asked questions

Are parlays profitable long-term?
On their own, no — every leg adds a layer of vig, so combined parlays carry massive hold (often 15–25%+ on 4-leg+ parlays). The exception: correlated parlays where the legs are positively related, or genuine +EV parlays that combine multiple +EV individual legs.
What's the difference between a parlay and a same-game parlay?
A standard parlay combines bets from different games (legs are independent). A same-game parlay combines bets within one game (legs are correlated). Books price SGPs with extra hold to offset the correlation, so they're typically worse value than equivalent cross-game parlays.
Do longer parlays pay more?
Yes — and they hit much less often. A 5-leg parlay of -110 legs pays roughly +2,400 but only hits about 4% of the time. The combined EV is usually worse than betting each leg individually.
How do I know if a parlay is +EV?
If every individual leg is +EV at the price you're getting, the parlay is +EV (and combines those edges). If even one leg is -EV, the entire parlay almost certainly is too. Build parlays from +EV legs only.

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