Calculator · Free
Edge calculator, fee-adjusted.
Compute your edge as a percentage of what you pay. Same formula CLV.gg ships in the live edge feed: (fair − book) / book. Sign tells you the side. Fees tell you what clears.
Inputs
Polymarket fees apply only on taker fills, never on the displayed mid-price. If you post a limit order (maker), fee = 0. The sportsbook side has no separate fee — vig is already stripped when computing the sharp fair, so don't double-count.
Net edge — tradeable
+5.69%
Buy YES on Polymarket · gross 7.69% before 2.00% fee
Show your work
Step 1 — gross edge (bettor perspective)
edge = (fair − poly) / poly
= (0.4200 − 0.3900) / 0.3900
= 0.0300 / 0.3900
= 7.69%
Step 2 — determine trade side
fair (42.00%) > poly (39.00%) → Polymarket underprices YES → Buy YES
Step 3 — fee adjustment (Polymarket taker fee)
net edge = gross − fee
= 7.69% − 2.00%
= 5.69%
+EV after fees: Buy YES on Polymarket clears 5.69% per unit.The detector is running. Bring a real tool.
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