No-vig Odds (Remove Margin)
Back to the calculator.
Open No-Vig Calculator (Edge Finder)
Paste sharp prices → get fair p/odds, EV% & Kelly instantly.
No-vig odds & overround
Bookmaker decimal odds include margin (overround). To get fair probabilities, invert odds and re-normalize.
2-way
Let odds be oA, oB. Then
overround = 1/oA + 1/oB, margin = overround − 1
pA = (1/oA) / overround, pB = (1/oB) / overround
Fair odds: fairA = 1/pA, fairB = 1/pB.
1X2
Sum inverted odds across H/D/A and divide each by the sum; invert for fair odds.
Diagnostics
Our calculator also shows “Spread %”, each side’s contribution (1/o − p); sums to margin.