How are parlay odds calculated?
Convert every leg to decimal odds, multiply the decimals together, then convert the combined price back to American or fractional odds.
Betting math
Parlay odds
calculator.
Combine your legs, see the break-even rate at the quoted price, and understand what the stake could return.
01 / Input
Build your parlay
01
02
$USD
02 / Readout
Here’s the combined number
Combined American odds
+358
Lower break-evenHigher break-even
Decimal odds4.58
Fractional odds179/50
Break-even probability21.83%
Potential profit$358.18
Total payout$458.18
Parlay legs2
i
Break-even at these combined odds is 21.83%. This is not the parlay’s estimated true win chance; quoted prices may include margin, and correlated legs need joint-probability pricing.
Read it correctly
More legs mean more conditions.
A parlay can increase the payout, but every leg has to win for the ticket to cash.
×
Odds multiply
Each leg increases the combined price.
2.40 × 1.91 = 4.58÷
Read the break-even rate
Invert the combined decimal odds to find the win rate needed to break even at that price.
1 ÷ 4.58 = 21.83%Common questions
Understand the tradeoff
A higher payout price has a lower break-even rate, but that rate is not the parlay’s actual chance to win. Seeing the price and break-even point together keeps the tradeoff visible.
Does this show the parlay’s actual chance to win?
No. It shows the break-even probability at the combined quoted price. The actual chance depends on the true probabilities and how the legs relate; for independent legs, multiply their true probabilities.
What does the payout include?
Total payout includes your original stake. Potential profit is the amount above the stake if every leg wins.
The FadeIt community
Open conversation
Talk through
the ticket.
Join the Discord to compare notes, suggest calculators, and ask questions about the math.