Accumulator / Parlay Calculator
Combine up to 20 selections, mark voids and losers, and see the combined odds, return and the implied chance that every leg wins.
Last updated
Quick answer
An accumulator’s combined decimal odds are the product of each selection’s odds: 1.80 × 2.10 × 1.65 = 6.24. A 10 stake returns 62.37 if every leg wins. A void leg counts as 1.00; one losing leg loses the whole bet.
Accumulator / Parlay Calculator
Free · no sign-up · calculates as you type
Why accumulators are hard to win
Every leg carries the bookmaker’s margin, and those margins multiply too. A three-leg accumulator of selections that each imply a 55% chance has an implied chance of all winning of about 17%.
Source: Calculated from 1.80 odds per leg (55.6% implied).
Frequently asked questions
How do you calculate accumulator odds?
Multiply the decimal odds of every selection together.
What happens if one leg is void?
A void (non-runner or postponed) leg is usually treated as odds of 1.00, so the accumulator continues with the other legs. Check your operator's rules.