No‑Vig Fair Odds Calculator

Enter opposing American odds and get the no‑vig implied probabilities.
No‑Vig % (A)
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No‑Vig % (B)
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No‑Vig Odds (A)
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No‑Vig Odds (B)
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What does this calculator do?

The No‑Vig Fair Odds calculator shows you the “pure” odds behind a market by removing the sportsbook’s margin from both sides of a matchup. Books intentionally price each side a little higher than fair to collect a commission no matter who wins — that extra buffer is the vig (or juice). If a market were truly even, the two sides would each be 50%, which converts to +100 on both teams. In reality, you’ll usually see something like −110/−110 or −115/−105. Those prices imply more than 100% probability when combined, which is exactly where the margin hides. Our tool strips out that margin so you can see what the market is saying once the house cut is removed.

How it works: we convert each moneyline into an implied probability, add them up, and then scale each side so the total equals 100%. The normalized probabilities are your no‑vig percentages. We also convert those back into American odds so you can compare directly to quotes. For a symmetric example like −110/−110, the raw implied probabilities are ~52.4% each, which adds to ~104.8%. Normalizing brings them to 50%/50%, and converting 50% back to American odds yields +100 on both. For an asymmetric market (say −120/+105), the math redistributes the margin proportionally so you get clean, fair percentages and the corresponding odds for each side.

Why it’s useful: fair odds help you compare books on level ground and judge whether a number is actually generous or just padded by higher vig. If one book’s price is close to your fair number while another is far off, you know where you’re more likely to find value. Fair odds are also a handy input when you’re building models, sizing bets, or back‑solving a “true” line from several noisy quotes. This page doesn’t tell you which side will win; it simply removes the tax so you can view market opinion without the markup. Pair it with our Vig calculator (to measure the margin itself), the Market Fees calculator (for exchange trading costs), and the EV calculator (to translate your edge into dollars) for a complete toolkit.

Frequently Asked Questions

“Fair” or “no‑vig” odds are the price you’d get if you stripped out the sportsbook’s cut. Books build a little margin (the “vig/juice”) into both sides, which is why a true 50/50 matchup is usually priced around −110 on each side instead of +100. Our calculator removes that margin so the two sides add up to a clean 100% and you can see the underlying, unbiased price.

We turn each moneyline into an implied probability, add them together, and then scale each side so the total equals 100%. For example, −110/−110 implies about 52.4% + 52.4% = 104.8%. Normalize those to 50%/50%, and when you convert 50% back to American odds you get +100 on both sides. That’s the no‑vig price.