Enter the odds of each leg and your total stake. The calculator multiplies the prices to give you the combined odds, the return and the profit — and shows the implied chance of every leg winning together.
Multiply the decimal odds of all legs to get the combined price, then multiply that by your stake. The profit is the return minus the stake you put down.
A void or postponed leg is normally treated as odds of 1.00 — it is removed from the multiplication and the rest of the slip continues to run.
Purely mathematically, every leg reduces your chance of winning. Two or three legs keep the combined implied probability respectable; ten legs is a lottery ticket, not a bet.