The calculators sharp bettors actually use — for sizing, pricing, and reading a line. Works with American odds and Polymarket cents. No signup, no ads.
Combined odds, exact payout, and the real chance every leg hits.
Open →American ↔ decimal ↔ Polymarket ¢ ↔ implied probability, instantly.
Open →Optimal bet size from your edge — with fractional Kelly for lower variance.
Open →Strip the vig to find the market's true, fair no-vig probability.
Open →How much the book is really taking — the built-in house margin.
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