No-Vig Fair Odds Calculator

How to use it

Change any input and the results update immediately. The values are also written into the address bar, so you can bookmark a calculation or paste the link to someone else and they will see exactly the same numbers.

Everything here computes with the same functions that produce the grades inside WeBall, so a number on this page will never contradict a number on a bet card.

What the term means

Odds with the bookmaker's margin normalised out, showing what the market actually believes.

To remove the vig, convert both sides of a market to implied probabilities, add them, and divide each by the total so they sum to exactly 100%. Two prices of −110 become 50% and 50%; a −200 / +170 market becomes roughly 64.4% and 35.6%.

Full definition of no-vig odds →

Learn the math behind it

A calculator is faster than doing this by hand, but knowing why the formula works is what lets you spot when a number is wrong. Read the full guide →