Parlay Calculator
Add up to 12 legs, switch between American, decimal or fractional odds, and see your payout in real time.
How the parlay calculator works
A parlay (or accumulator) combines two or more selections into a single bet. Every leg must win for the ticket to cash, but in exchange the sportsbook multiplies the odds together — which is why a $10 stake on a five-leg parlay can pay out hundreds of dollars.
The math is simple. Convert every leg's odds to decimal format, multiply them together, then multiply that total by your stake. The calculator above does all of it automatically and in real time as you type, no matter which format you prefer.
Parlay, accumulator, acca — what's the difference?
None. They are three names for the same bet. American sportsbooks call it a parlay. UK and Irish bookmakers call it an accumulator, or "acca" for short. Australian books sometimes call it a multi. The math, the rules and the appeal are identical: bigger payout, smaller chance of winning.
Why parlays favor the house
Each leg of a parlay carries the sportsbook's built-in margin (the "vig"). When you multiply three or four legs together you also compound that margin. A single bet might have a 4-5% hold; a 5-leg parlay can have an effective hold of 20% or more. This is why sportsbooks aggressively promote parlays and same-game parlays — they are the most profitable product on the book.
That doesn't mean parlays are always a bad bet. They can be a legitimate way to amplify upside on selections you genuinely have an edge on. But going in blind, stacking long parlays just for the dream payout, is the fastest way to drain a bankroll.
Tips for smarter parlays
- Keep it short. Two- and three-leg parlays have manageable variance. Beyond five legs the math turns against you sharply.
- Avoid heavy favorites. Stacking a parlay with −300 favorites barely moves the needle on payout but every leg still adds risk.
- Shop the lines. A 0.05 difference in decimal odds on each leg compounds across a five-leg parlay. Use the Odds Converter to compare prices across books.
- Mind correlation. Most books block obviously correlated legs, but Same Game Parlays are repriced to account for it. Check the SGP odds vs. building the same parlay manually.
- Measure the value. Use the Value Calculator on each leg to make sure you actually have an edge before combining them.
Lucky 15, Yankee and other multi-bets
A pure parlay is one ticket — all legs must win. UK-style multi-bets cover more combinations of the same selections so partial wins still pay out. A Lucky 15 on four selections is actually 15 bets: 4 singles, 6 doubles, 4 trebles and 1 four-fold. A Yankee is 11 bets across the same 4 selections, no singles. A Heinz is 57 bets across 6 selections. The calculator above handles the straight parlay; for full Lucky 15 staking we will add a dedicated tool soon.