What are the fair odds without the book’s cut?

Remove the sportsbook margin from a two-way market to get the fair win chance, fair odds and the book’s hold.

How it works

• Each side’s implied probability is divided by their sum, so the two add up to 100%.
• Hold = 1 − 1 / (sum of implied probabilities). -110 / -110 holds 4.5%.
• This is the multiplicative method. It is most accurate on sharp, close-to-even markets such as Pinnacle’s.

Questions

Which book should I de-vig?

The sharpest one you can see, usually Pinnacle. A fair price from a soft book carries its errors along.

What is a good hold?

Under 3% is a low-margin market. Spreads and totals at US books are usually 4.5%; player props and parlays are often 7% or more.

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