Assumptions and limitations
- Independence: correlated same-game legs invalidate a simple multiplied win probability.
- Compounded vig: each priced leg embeds juice; parlays usually worsen effective hold versus betting legs separately.
- Pushes and voids: sportsbooks typically remove the affected leg, but rules differ by book and market.
- Rounding: displayed money and American odds are rounded; sportsbook stake precision can change cents.
- Max legs: this page caps at 15 legs for usability and common book limits.
Common mistakes
- Mixing up profit with total payout in mental math.
- Entering American odds between -99 and +99, which are invalid.
- Treating a same-game parlay as if the legs were independent.
- Ignoring that a free-bet or boosted parlay may use different settlement rules.
Related calculators and guides
- All betting calculators
- Odds Converter and Implied Probability (coming soon) for single-leg price translation
- Expected Value and Kelly Criterion (coming soon) for stake and value decisions after you price the parlay
- Outlier Positive EV features
- Responsible gambling resources
Parlay calculator FAQs
Convert every leg to decimal odds, then multiply those decimals together. The product is the combined decimal price. Profit equals wager × (combined decimal − 1). Total payout equals wager × combined decimal.
Profit is only the money you win on top of your stake. Total payout is profit plus your original wager returned if the parlay wins. At combined +300, a $100 stake earns $300 profit and $400 total payout.
Parlays can produce large payouts from a small stake, but they also compound sportsbook margin and variance. Correlated same-game legs can make a simple multiplied probability misleading. Use this calculator for pricing clarity, then evaluate each leg’s value separately.
This tool supports 2 to 15 legs, matching common sportsbook parlay limits. You can add or remove legs and rename them for a clearer bet slip.
No. A push or void typically removes that leg and recalculates the remaining parlay, but sportsbook rules vary. Same-game parlays also break the independence assumption used for a naive combined probability.
Methodology and review
Formulae follow standard decimal multiplication for multi-leg parlays. The page was reviewed on against the Outlier calculator SEO blueprint: crawlable calculator state, explicit profit vs payout language, accessible labels, canonical URL, breadcrumbs, and visible FAQ content. Outputs are educational and do not constitute betting advice.
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