Parlay Calculator
Calculate the combined odds and potential payout for a multi-leg parlay bet. Enter values for instant results with step-by-step formulas.
Formula
Combined Odds = Leg1 Decimal x Leg2 Decimal x ... x LegN Decimal
Each leg's American odds are converted to decimal odds. Positive odds: Decimal = 1 + (odds/100). Negative odds: Decimal = 1 + (100/|odds|). The decimal odds of all legs are multiplied to get combined odds. Payout = Stake x Combined Decimal Odds. Implied probability is the product of each leg's individual probability.
Worked Examples
Example 1: Three-Leg NFL Parlay
Problem: A bettor wagers $50 on a three-leg parlay: Team A at -110, Team B at +150, Team C at -130.
Solution: Convert to decimal odds:\nTeam A: -110 -> 1 + (100/110) = 1.909\nTeam B: +150 -> 1 + (150/100) = 2.500\nTeam C: -130 -> 1 + (100/130) = 1.769\nCombined odds: 1.909 x 2.500 x 1.769 = 8.443\nPayout: $50 x 8.443 = $422.16\nProfit: $422.16 - $50 = $372.16\nImplied probability: 52.4% x 40.0% x 56.5% = 11.8%
Result: Payout: $422.16 | Profit: $372.16 | Combined odds: +744 | Win probability: 11.8%
Example 2: Two-Leg Favorites Parlay
Problem: A bettor places $200 on a two-leg parlay with two favorites: Game 1 at -200 and Game 2 at -150.
Solution: Convert to decimal odds:\nGame 1: -200 -> 1 + (100/200) = 1.500\nGame 2: -150 -> 1 + (100/150) = 1.667\nCombined odds: 1.500 x 1.667 = 2.500\nPayout: $200 x 2.500 = $500.00\nProfit: $500.00 - $200 = $300.00\nImplied probability: 66.7% x 60.0% = 40.0%
Result: Payout: $500.00 | Profit: $300.00 | Combined odds: +150 | Win probability: 40.0%
Frequently Asked Questions
What is the difference between a parlay, a teaser, and a round robin?
These are all multi-bet formats but with important differences. A standard parlay requires all legs to win for any payout at all. A teaser is a type of parlay specific to point spread and total bets where you receive additional points in your favor on every leg, but the payout is reduced accordingly. For example, a six-point teaser on a football game might move a minus 7 spread to minus 1. A round robin takes three or more selections and creates every possible two-team or three-team parlay combination from those picks. So with four selections, a round robin of two-team parlays creates six separate bets. Round robins cost more because you are placing multiple bets but provide protection since you can still profit even if one or two selections lose.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.
How accurate are the results from Parlay Calculator?
All calculations use established mathematical formulas and are performed with high-precision arithmetic. Results are accurate to the precision shown. For critical decisions in finance, medicine, or engineering, always verify results with a qualified professional.
Can I share or bookmark my calculation?
You can bookmark the calculator page in your browser. Many calculators also display a shareable result summary you can copy. The page URL stays the same so returning to it will bring you back to the same tool.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.