Expected-value edge on a contract from market price + your probability; returns edge % and a BUY / SELL / SKIP read.
Kelly position size (full / half / quarter / eighth) from win probability, price, and bankroll, with a risk rating.
Update a prior with one or more pieces of evidence; returns the posterior and the per-step chain.
Convert between implied probability, American odds, and decimal odds.
Compare a market price to the historical base rate for a class of events; returns the gap in points + sample quality.
Grade a same-game multi-leg combo: EV %, fair vs offered odds, correlation-aware joint probability, negative-correlation trap flag.
Live Kalshi-implied odds of a Fed rate cut, hold or hike at each remaining 2026 FOMC meeting, plus the next meeting and the current fed funds rate.
Cross-venue price gaps between Kalshi and Polymarket on the same contract. Largest gap free; whole board on Pro.
US macro-health composite (0–100) and regime, plus six category scores. Composite always free.
PWR for all 32 NFL teams — points per game above an average team on a neutral field, with rank and tier.
Turn an NFL spread + total into win probability, projected score, and over/cover probability — or pass two teams to derive the spread.
The Ladder — every Kalshi strike vs our whole distribution (spreads, season wins, props) with the derived verdict: SHAPE, LOCATION or PRICED.
+2 more tools listed on main page