What is a devig?

In sports betting, a 'devig' is the process of finding the fair odds for a bet by removing the sportsbook's 'vig' or 'juice'. There are several methods of devigging including Multiplicative, Additive, Shin, and Power. For simplicity and the best results, the devig calculator will use all of these methods and return the most conservative (i.e. highest) result. The term 'devig' is also used as shorthand to mean a 'devig result'.

Getting the fair odds is important so that you can compare it to the odds you're offered for any given bet. With these two numbers, you can calculate the expected value of the bet, and thus the amount you should stake on it. The devig calculator will do all of this and show you the results.

A devig is done with the relevant legs from either a sportsbook that is sharp in that market, or from a market average of the legs. For example, Pinnacle is sharp for NFL money lines. If you wanted to devig a bet on the Ravens to beat the Steelers, your inputs would be the odds for the Ravens and the odds for the Steelers that Pinnacle offers. More details and examples for devig inputs can be found on the devig calculator page.

A practical example of a simple devig

Suppose you want to know if this WNBA boost is a good bet:

If we consider Pinnacle sharp for WNBA money lines, we would use its odds for each of the three moneyline bets as our leg input.

A devig for this bet would look like this. We can see that the fair odds were calculated to be +179. Since we're only offered +171, this makes the expected value negative, and you would know not to place this bet.