No-vig & hold calculator
Strip the vig to find the fair odds.
Bookmaker hold (vig)
4.76%
Fair odds — A
+100
Fair odds — B
+100
Fair win % — A
50%
Fair win % — B
50%
Enter both sides of a two-way market in American odds. “Fair” odds remove the book’s margin — the true price the market implies.
What “no-vig” means
Books build in a margin — the vig (or “hold”) — so the two sides of a market add up to more than 100%. Removing it proportionally gives the fair odds: the market’s honest estimate of each side’s true probability, with the house edge stripped out.
Those fair probabilities are the best free estimate of “true odds” you can get, and they’re the input the EV calculator needs. Find a book offering a better price than the fair line and you’ve likely found value — exactly what Bankroll Guardian flags automatically across your books.
Track every bet automatically
Stop doing the math by hand. Bankroll Guardian logs your bets and shows P&L, ROI, CLV and more — free to start, no card required.