Remove the bookmaker margin from any market to reveal the true implied probability and fair odds for each outcome. The essential tool for finding value.
Vig (short for vigorish, also called juice or overround) is the bookmaker's built-in profit margin. In a fair two-outcome market, both sides would be priced at 2.00 (50% implied probability each, totalling 100%). A bookmaker prices both at 1.90, implying 52.6% each — total 105.2%. The extra 5.2% is the vig.
This tool strips the vig to reveal the underlying probabilities the bookmaker actually believes — without the margin distorting them. Compare the no-vig probability to your own estimate: if you believe an outcome is more likely than the no-vig probability suggests, the bet may be +EV.
Our Margin Calculator shows the total overround and rating. This no-vig calculator goes one step further — it tells you the fair probability and fair odds for each individual outcome. Both use the same underlying maths; the difference is what they emphasise as output.