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FanDuel same game parlay calculator

FanDuel supplies the price of a Same Game Parlay and does not publish its pricing method. This tool calculates return at the quoted price, then compares its implied probability with an independent product of each leg’s no-vig probability. The gap combines correlation and margin; it is not a forecast or value judgement.

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Calculated result

Quoted total return
$30.00
Independent fair probability
26.09%
Independent decimal price
3.8333
Quoted implied probability
33.33%
Quoted / independent probability ratio
1.2778
Show the working

Quoted total return
10 × 3

Independent fair probability
Product of per-leg proportional no-vig probabilities; assumes independence

Independent decimal price
1 ÷ independent probability

Quoted implied probability
100 ÷ quoted decimal price

Quoted / independent probability ratio
This gap combines correlation and margin; it does not measure value

Formula and worked example

Independent probability = product of no-vig leg probabilities. Ratio = quoted implied probability ÷ independent probability.

Legs at −110/−110 and −120/+100 have an independent product near 26.09%. A +220 quoted price implies 31.25%; the ratio is about 1.198.

Default example outputValue
Quoted total return$30
Independent fair probability26.087%
Independent decimal price3.8333
Quoted implied probability33.3333%
Quoted / independent probability ratio1.2778

The independent product is not the true chance of correlated same-game legs. The quoted price alone cannot separate correlation from margin.

Rules reference: FanDuel’s published guidance, reviewed November 6, 2026. Mathematical model shown above; actual offer terms take precedence.

Use the market data in your app

Read game market prices through GET /api/v1/markets and player props through GET /api/v1/props. The API reference describes available fields, filters and data access.

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Educational calculations only. Responsible gambling resources.

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