Parlay / Accumulator Calculator
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Combine 2 to 8 legs to see the combined odds, total return and implied probability of a parlay (accumulator). It also shows the honest catch most calculators hide: every leg multiplies the bookmaker's margin.
Enter odds to calculate the parlay.
How parlay odds work
Combined odds are simply every leg's decimal odds multiplied together. Three legs at 2.00, 1.50 and 1.80 give 2.00 × 1.50 × 1.80 = 5.40. A $10 stake returns $54 — if all three win. Miss one leg and the whole bet loses.
The honest catch: margin compounds
Parlays look exciting because the payouts are big, but there's a reason bookmakers promote them. Each leg already has the bookmaker's margin (vig) baked in, and combining legs multiplies that margin. A single bet might give the house a 3–5% edge; a five-leg parlay can hand it far more. The more legs you add, the longer the odds — and the worse the true value. Use the Margin Calculator to see the vig on any single market, and the Odds Converter to switch formats.
Calculations are exact from the odds you enter. This tool is for information only — always confirm the final odds and any parlay rules (e.g. how pushes are treated) with the operator.