Accumulator calculator

An accumulator (also called a parlay in the US, acca in the UK, or multi-bet in Australia) combines multiple selections into a single bet. All selections must win for the bet to pay out. The odds of each selection are multiplied together, creating potentially large returns from a small stake — but with correspondingly low probability of winning.

The combined odds are simply the product of each selection's individual odds. For example, three selections at 1.80, 2.10, and 1.50 give combined odds of 1.80 x 2.10 x 1.50 = 5.67. This means a 10 unit stake would return 56.70 units (46.70 profit).

While accumulators offer exciting payouts, the bookmaker margin compounds with each leg. If each selection carries a 5% margin, a 5-leg accumulator effectively has a 23% margin working against you. This is why bookmakers actively promote accumulators — they are the most profitable bet type for the house.

Use the fair odds calculator to check the margin on each leg, and the EV calculator to determine whether the accumulator as a whole offers positive expected value.