How do you calculate parlay odds?

Multiply the decimal odds of each selection together. Example: three selections at 2.00, 1.80, and 2.50 → 2.00 × 1.80 × 2.50 = 9.00. A £10 stake returns £90 (£80 profit).

What is the true probability of winning a parlay?

Multiply the implied probabilities of each leg. Example: three 50% selections → 0.50 × 0.50 × 0.50 = 12.5% combined win probability. Bookmaker margin compounds with each leg, making parlays worse value than single bets.

Are parlays good value?

No — bookmaker margin compounds with every added leg. A 5% margin single becomes roughly 21% margin on a 5-leg parlay. Parlays are high-entertainment, low-EV bets. Singles offer better long-term value.

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How Parlay Odds Work

Each selection's decimal odds are multiplied together. A 3-leg parlay at 2.00 × 1.80 × 2.50 = combined odds of 9.00. A £10 stake returns £90 (£80 profit).

Why Parlays Lose Value

Bookmaker margin compounds with every leg. A 5% margin on a single becomes approximately 21% effective margin on a 5-leg parlay. Singles offer better long-term expected value. See our singles vs accas breakdown.