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Parlay Odds Formula Explained With Examples
Learn the exact parlay formula, from converting legs to decimal odds through total payout and implied win probability.
1 min read
Parlay math is straightforward once every leg is in decimal format.
Step 1: Convert Each Leg to Decimal#
If your book shows American odds, convert each leg first.
Step 2: Multiply Decimal Legs#
- Combined Decimal = Leg1 * Leg2 * Leg3 ...
Example:
- 1.91 * 1.80 * 2.10 = 7.22
Step 3: Calculate Payout and Profit#
- Payout = Stake * Combined Decimal
- Profit = Payout - Stake
For $100 stake at 7.22 decimal:
- Payout = $722
- Profit = $622
Step 4: Get Implied Probability#
- Probability = (1 / Combined Decimal) * 100
For 7.22 decimal:
- 13.85%
Use the Parlay Calculator for instant combined odds and payout projections.
Common Questions
How are parlay odds calculated?
Convert each leg to decimal odds, multiply all decimal odds together, then multiply by stake for total payout.
What happens if one parlay leg loses?
In a standard parlay, one losing leg means the full parlay loses.