Vig & hold calculator
Enter both sides of a two-way market to see how much juice the book is charging — and the no-vig fair odds you should actually be comparing.
Vig and hold calculator
- Total implied
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- Vig
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- Hold
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Side A
- Implied probability
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- Fair probability
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- No-vig fair odds
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- Edge at this price
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Side B
- Implied probability
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- Fair probability
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- No-vig fair odds
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- Edge at this price
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Why the vig matters
Every price a sportsbook posts is shaded in its favour. Add up the implied probabilities of both sides of a market and you’ll get more than 100% — that overround is the vig, and it’s the single biggest drag on a bettor’s long-term results. A standard -110 / -110 line looks like a coin flip, but it’s really charging you about 4.5% to play.
Removing the vig rescales both sides back to 100% and reveals the market’s fair estimate of each outcome. Those no-vig odds are what you should compare across books and against prediction-market prices — if you can find a better number than the fair line at a sharp book, that gap is your edge. Convert any price with the odds converter.
Frequently asked questions
- What is the vig (or juice) in betting?
- The vig — also called juice or the overround — is the margin a sportsbook builds into its odds. Add up the implied probabilities of both sides of a market: anything over 100% is the vig. A standard -110 / -110 market implies 104.8%, so the vig is about 4.8%.
- What is the difference between vig and hold?
- Vig (overround) is how much the implied probabilities exceed 100%. Hold is the share of total money wagered the book expects to keep on a balanced market — it equals the vig divided by the total. A -110 / -110 line has a 4.8% vig but a 4.5% hold.
- What are no-vig (fair) odds?
- No-vig odds remove the margin by scaling both implied probabilities so they add up to exactly 100%. The result is the market’s fair estimate of each outcome’s true probability — the number you should compare against other books or a prediction-market price to judge real value.
- How do I use no-vig odds to find value?
- Compute the no-vig fair price at a sharp book, then check whether another book or market offers a better number on the same side. If the price you can get implies a lower probability than the fair estimate, you have positive expected value. The fair-value edge field shows this for each side at the prices you enter.
For informational purposes only. Not betting or financial advice. Please gamble responsibly. 21+ where applicable.