Calculators

Every tool here runs the same formulas as the live scanner — no simplified approximations — and works in any odds format.

Vig calculator

Paste two or three sides of a market and see the overround and hold the book built in — or whether the sides sum under 100%.

Split a stake across two outcomes at two books so the return is identical either way, and see the locked-in profit.

Strip the margin from a quote with the multiplicative and power methods to see the fair probabilities.

American, decimal, fractional and implied probability — plus the equivalent prediction-market contract price.

The exact 7% × p × (1 − p) taker fee per fill, rounded like Kalshi rounds it, at any size and price.

Category-rate taker fees on the same curve, with the full price table per 100 shares.

Two sides on two venues, fees for each, your stake — does the opportunity still clear? The scanner's own math, by hand.