Add each selection at its decimal odds and the calculator multiplies them into the combined price, then projects the payout and profit for your stake.
The implied probability line is the part most accas ignore: multiply a few 70% legs together and the combined chance drops fast — four such legs land only about one time in four. That's why accumulators pay big and lose often.
Convert between decimal, fractional, American odds and implied probability.
Check whether a set of odds guarantees a profit — and how to split your stake.
Check whether a bet has positive expected value at your estimated probability.
See the bookmaker's built-in margin and what the fair odds would be without it.
Lock in a profit (or cap a loss) by betting the other side at current odds.
