Parlay Calculator

What this tool does

A parlay (also called an accumulator) combines multiple separate picks into one slip. Every leg has to hit for the whole thing to pay out — if even one leg loses, the entire slip loses. In exchange for that risk, the payout multiplies: combined odds are simply each leg's decimal odds multiplied together.

How to use it

Type each leg's odds into its own row — any format is fine, the tool figures out whether you typed American, decimal, or fractional. Add as many legs as you want, remove any with the ✕, and enter a stake to see the potential payout.

Why the probability matters more than the payout

The payout number gets bigger and more exciting with every leg you add — but your real odds of collecting it shrink fast, since independent probabilities multiply together. Two legs at roughly 52% each already drops your combined chance to around 27%; five legs at that same rate is under 4%. This tool shows that drop explicitly, leg by leg, so the probability stays as visible as the payout — not an afterthought in small print.