No-vig odds are the fair odds you get after removing the sportsbook's margin (vig) from a market. Devigging reveals the true implied probability — the benchmark for spotting +EV bets.
Take each side's implied probability (1 ÷ decimal odds), then rescale them so they sum to exactly 100%. The result is the no-vig fair probability for each side, and 1 ÷ that is the fair odds.
A single book's no-vig line is a cheap estimate of true odds; a consensus across many books — weighting sharp books more — is far more reliable. That fair line is what every +EV and arbitrage engine is built on.
It's the best low-effort estimate. A multi-book consensus, weighted toward sharp books, is more accurate than devigging a single soft book.
Compare them to the price you can actually bet. If your price beats the fair odds, the bet is +EV.