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No-Vig & +EV Calculator

Strip the vig from a two-way market to get the true fair odds, then measure the expected value of the price you can actually bet.

Doing this by hand, one bet at a time?
Our API runs this math automatically across 25+ sportsbooks in real time — surfacing +EV bets and arbs the moment they appear. See the free live board, or plug into the API.
Get the API →

FAQ

What does "devigging" mean?

Removing the sportsbook's margin (vig) from a market. We convert each side's odds to implied probability, then rescale so they sum to 100% — the result is the fair, no-vig probability.

How is +EV calculated?

EV% = (your decimal odds × fair probability) − 1. A positive number means the price you're getting is better than the true odds — a long-run edge.

Is a no-vig line the true probability?

It's the best cheap estimate. Sharper books and a consensus across many books give a more reliable fair line — which is what our engine computes.

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