The vig (or "juice," or "hold") is the bookmaker's built-in cut. On a coin-flip market a fair price is +100 on each side, but a book posts -110 / -110, and those two prices imply a total probability over 100%. That overround is the hold. The classic -110 / -110 market carries about a 4.76% hold.
Enter both sides. The calculator normalizes the two implied probabilities back to 100%, which strips the vig and leaves the fair, no-juice price and probability for each side. That fair number is what you compare your bet against to find value: feed it into the EV Calculator. To see how The Odds Gap devigs sharp markets across the whole board, read the Expected Value and +EV betting explainers.
The Odds Gap holds every book's price, so you do not have to type them in by hand. Skip straight to the live tools:
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