Free tool · Sharp-style
Hold & Devig Calculator
Enter both sides of a 2-way market. We'll show you the book's margin (hold) and the no-vig fair prices — the closest proxy to what the market actually thinks.
e.g. -110, +140
The other side
Side A implied
52.38%
With the vig
Side B implied
52.38%
With the vig
Book hold
4.76%
The margin built in
Side A — fair price
+100
50.00% no-vig
Side B — fair price
+100
50.00% no-vig
How to read this
Both sides of a market sum to over 100% implied — that excess is the hold. At -110/-110 it's 4.76%; sharp books like Pinnacle run as low as 2%, while parlay-heavy retail books can hit 7-10%.
Strip out the vig by normalizing both sides to sum to 100%. The result is the no-vig fair price — the closest read on what the market actually believes.
fair_A = implied_A / (implied_A + implied_B)
hold = (implied_A + implied_B) − 100
hold = (implied_A + implied_B) − 100
What to do with it: use no-vig fair prices from a sharp book as your true line, then shop your side across retail books for the best price. Edge measured against fair, not against the juiced line.