Lakeshore Edge Create Free Account
Free Tool · No Signup

No-Vig / Fair Odds Calculator

Paste both sides of a market. This strips the sportsbook's vig and shows the fair odds and the true implied probability — the same de-vig math we grade every pick against.

Enter both sides to see the fair price.

How it works

Every odds price is really a probability in disguise. The two sides of a fair market should add up to exactly 100%. They never do at a sportsbook — they add up to more, and that overshoot is the vig (the house cut). De-vigging just rescales the two sides back down so they sum to 100%.

overround = impliedA + impliedB
vig = overround − 1
fairA = impliedA / overround   (same for B)
Why it matters The no-vig price from a sharp book is the cleanest estimate of a real probability you can get. If another book lets you bet that side at a better number than the fair price, you've found positive expected value. It's also the benchmark behind closing line value — the metric we live by.

FAQ

What is the vig?

The sportsbook's built-in commission. On a -110 / -110 market each side implies 52.4%, totaling 104.8% — that 4.8% over 100% is the vig.

How do I remove the vig?

Turn each side into an implied probability, add them up, and divide each by the total. The results sum to 100% and are the fair probabilities.

What are fair odds good for?

They're the market's true read on a probability. Beating a sharp book's fair price elsewhere is the definition of a +EV bet.

See fair odds applied to a live board
We de-vig every line, compare it to our model, and grade the result against the close — in the open.
Open the audit
Free calculators
All betting calculators → Closing line value (CLV) calculator → Kelly stake calculator → Read: what closing line value actually proves →
This tool is educational and is not betting advice. Sports betting carries real financial risk. Bet responsibly and only with money you can afford to lose. If gambling is causing harm, visit ncpgambling.org or call 1-800-GAMBLER.