How do you calculate parlay odds?

Convert each leg to decimal odds, multiply them all together, then convert back to American odds. For example, two -110 legs are 1.91 x 1.91 = 3.65 decimal, which is about +265.

How is a parlay payout calculated?

Multiply your stake by the combined decimal odds for the total return. Subtract your stake to get the profit. A $10 parlay at 3.65 decimal returns $36.50 total, a $26.50 profit.

Are parlays a good bet?

Parlays multiply the payout but also multiply the sportsbook's vig on every leg, so they are usually negative expected value unless each individual leg is a positive-EV bet. The more legs, the more the house edge compounds.

Free Parlay Calculator

Add each leg's odds and your stake to instantly see the combined odds, payout, profit, and the real probability your whole parlay hits.

Calculator How parlay odds work Payout chart More calculators

Parlay Payout Calculator

Enter each leg in American odds (e.g. -110 or +150). Add as many legs as you like — the combined price and payout update as you type.

Stake ($)

Heads up: this is the fair, independent-legs price. For a same-game parlay (SGP), sportsbooks shorten the odds because the legs are correlated — your real quote will be lower than the number above.

How parlay odds are calculated

A parlay (or accumulator) combines multiple bets into one ticket — every leg must win or the whole thing loses. The math is simple: convert each leg to decimal odds, multiply them together, and convert back. Two -110 legs become 1.91 × 1.91 = 3.65 decimal, or about +265. A $10 stake returns $36.50.

Because the payouts multiply, parlays look tempting. But the sportsbook's margin (the vig) is baked into every leg, so it compounds too. A parlay is only a good long-term bet if each individual leg is itself positive expected value — otherwise you're paying the house edge several times over on one ticket.

The true probability your parlay hits

Multiply each leg's implied probability together and you get the combined chance all of them land. Four coin-flip (-110, ~52%) legs only hit about 7.5% of the time. The calculator above shows this so you can see the real odds you're up against, not just the shiny payout.

Parlay payout chart

Combined odds and payout for parlays made of standard -110 legs, on a $10 stake:

Legs	Combined odds	$10 pays	True win %
2	+264	$36.45	27.4%
3	+596	$69.58	14.4%
4	+1228	$132.83	7.5%
5	+2436	$253.59	3.9%
6	+4741	$484.13	2.1%

Notice how the true win probability collapses far faster than the payout climbs — that gap is the house edge stacking with every added leg.

More free betting calculators

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