Free Tool · Betting Math

No-Vig / Fair Odds Calculator

Remove the sportsbook's margin from a two-way market to get the fair odds and fair probability.

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No-Vig Fair Odds
50.0%Fair Prob A
+100Fair Odds A
50.0%Fair Prob B
+100Fair Odds B
4.7%Vig / Hold
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Where the vig hideshold 4.7%
MARKET (WITH VIG)VIG 4.7%FAIR (DE-VIGGED)100%
Frequently asked2 questions
What is the vig?
The sportsbook's built-in margin, also called juice or hold. It makes both sides' implied probabilities sum to more than 100%.
Why de-vig a line?
The de-vigged probability is a sharper estimate of the true chance, useful for finding +EV bets and comparing books.
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Parlay Calculator→Combine multiple bets into one parlay and see the combined odds, total payout, and implied probability.Bet Calculator→Enter your odds and stake to see the exact payout, profit, and implied probability of a single bet.Odds Converter→Convert betting odds between American, decimal, and fractional formats, and see the implied probability.Expected Value Calculator→Estimate the expected value of a bet from your win probability and the offered odds.Arbitrage Calculator→Check whether two prices form an arbitrage and get the stake split for a positive return on every outcome.Kelly Criterion Calculator→Find the bankroll-optimal stake from your win probability and the odds, with fractional-Kelly options.

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No-Vig Fair Odds Calculator | Courtside