Convert between American odds, decimal odds, and implied probability, then use the no-vig calculator to estimate the fair price of a two-way market. Type in any one field and the others update.
Enter the odds for both sides of a two-way market, such as a point spread or moneyline.
Sportsbook prices include a margin, so the implied probabilities of both sides add up to more than 100%. Removing that margin gives a better estimate of the market's view. It also helps you judge how much value a boosted price or a promotion adds. Pair it with the bonus bet converter to see what an offer is worth.
For negative odds, divide the odds (without the minus sign) by that number plus 100. For positive odds, divide 100 by the odds plus 100. For example, -110 is about 52.4% and +150 is 40%.
Vig, or hold, is the margin a sportsbook builds into its prices. It is the amount by which the implied probabilities of all outcomes add up to more than 100%.
Fair odds remove the sportsbook margin from a two-way market so both sides add up to exactly 100%. They are an estimate, not a guarantee of the true probability.
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