Multi / Parlay Calculator

Combine any number of legs to see the total price, the return, and the chance every leg actually lands.

Combined odds$5.40
Total return$270.00
Profit$220.00

Every leg has to land. Based on these prices that is roughly a 18.5%chance — and the bookmaker's margin is charged on each leg, so it compounds with every one you add.

How the maths works: why margin compounds across legs.

How it works

Multiply every leg's decimal odds together, then multiply by your stake. Three legs at $2.00, $1.80 and $1.50 combine to $5.40, so $50 returns $270.

The part worth understanding

The margin is charged on every leg, so it compounds. A four-leg multi at books holding 5% each carries roughly 20% of margin against you — far worse than any single bet, which is precisely why multis are promoted so heavily.

The chance figure above assumes the legs are independent. Legs from the same match rarely are, and correlation can make the real chance meaningfully different from the number shown.