Parlay Calculator
Enter the odds for each leg of your parlay (accumulator) bet. The calculator returns the combined decimal odds, total payout, profit, and implied combined probability.
All legs must win for the parlay to pay out. Combined odds = product of all leg odds. Implied probability shows how often you need this combination to hit.
What is the Parlay Calculator?
A parlay (or accumulator) is a single bet that combines multiple selections. All selections must win for the parlay to pay out, but the combined odds multiply. This calculator computes the combined odds, total payout, and implied probability for any parlay.
How to use the Parlay Calculator
- Add or remove legs to match your parlay size.
- Enter the decimal odds for each leg.
- Enter your stake.
- The combined odds, implied probability, total payout, and profit appear on the right.
The formula
Combined Odds = Odds(leg 1) × Odds(leg 2) × ... × Odds(leg n)
Total Payout = Stake × Combined Odds
Profit = Total Payout − Stake
Implied Probability = 1 / Combined OddsWorked example
A 3-leg World Cup parlay:
- Argentina to win (2.10)
- Brazil to win (1.85)
- Over 2.5 goals in France vs Japan (2.50)
Combined odds = 2.10 × 1.85 × 2.50 = 9.7125
Implied probability = 1 / 9.7125 = 10.30%
With a $10 stake: Total payout = $97.13, Profit = +$87.13
All three must win - the 10.30% implied probability is sobering once you realise even moderate-favourite parlays still fail more often than not.
Get the best odds across 4 bookmakers via API
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Frequently Asked Questions
Are parlays a good bet?
Generally no. The bookmaker margin compounds across legs, so a parlay's expected return is worse than betting each leg individually. They're fun but not +EV.
What's the difference between a parlay and a teaser?
A parlay multiplies odds with no line adjustment. A teaser lets you move the spread or total in your favour in exchange for lower odds.
How many legs maximum?
Most bookmakers allow 15-30 leg parlays. The implied probability becomes minuscule (a 10-leg parlay at -110 each leg has ~1.6% chance of hitting).
Why do my actual odds differ from this calculator?
Some bookmakers round in unusual ways, apply parlay-specific margin, or use SGP (same game parlay) correlation adjustments. This calculator gives the mathematically correct combined odds.
Can I use this for a Same Game Parlay (SGP)?
SGPs have correlated outcomes (e.g. Mbappé to score AND France to win) and bookmakers adjust the price below the raw multiplication. This calculator gives the un-adjusted product - your actual SGP price will be lower.
Is this calculator the same as the Bet365 / Pinnacle one?
Yes - the math is identical. We round to 3-4 decimal places. Your bookmaker may round differently for display, but the underlying math is the same.