How are accumulator odds calculated?
Multiply the decimal odds of every leg together. Four legs at 1.50, 1.80, 2.00 and 1.60 give a combined price of 8.64, so a €10 stake returns €86.40 if all four win.
Accumulator calculator
Free, no signup. Last updated 15 August 2026.
Enter your stake and the decimal odds of each leg. The calculator multiplies them into a combined price, shows the payout, and tells you the chance the market gives all of them landing together.
Total payout
-
Combined odds
-
Profit if it lands
-
Implied chance
-
Why accumulators are priced in the bookmaker's favour
Combining legs multiplies the odds, which is the appeal. It also multiplies the margin on every one of those legs, which is the cost. A single bet into a market with a 5 percent overround gives away 5 percent. Put four of those legs together and you are giving away closer to 20 percent, compounded, before a ball is kicked.
That is why a four-fold at 5.06 feels like a great price and is usually a worse bet than any of its four legs backed separately. The payout is bigger, the expected value is smaller, and the variance is enormous.
The arithmetic of all four landing
Four legs each with a genuine 66 percent chance land together only 19 percent of the time. Eight such legs land 4 percent of the time. Human intuition is very bad at this, and the entire accumulator business is built on that gap.
What we do instead
We publish singles. One selection, one price, one result, which is also the only format where a public track record means anything, because there is nothing to hide inside a combination.
Frequently asked questions
Are accumulators worth it?
Statistically no. Each leg carries the bookmaker margin, and combining them compounds that margin, so an accumulator has a worse expected value than backing the same selections individually. They are entertainment rather than strategy.
What is the difference between an accumulator and a parlay?
Nothing. Accumulator is the British term and parlay is the American one for the same bet: several selections combined into one, where every leg must win.
Does one losing leg kill the whole bet?
Yes, unless the leg is void, in which case most bookmakers remove it and recalculate the accumulator at the remaining odds. A system bet is the alternative that still pays something when one leg fails.
We do this maths on every pick
Three value picks a day in the free Telegram, each published with its price and stake, and every one of them ends up on the public record.
Join the free Telegram →18+. These tools are for information only. Betting involves risk and any bet can lose. Nothing here is financial advice.
← All calculators