Prediction Market Tools
Free tools to help you analyze, track, and compare prediction markets. Built for traders on Polymarket and beyond.
Probability Calculator & Odds Converter
Convert between probability formats (percentage, decimal, fractional, American), calculate expected value, implied probability, and optimal bet size with the Kelly Criterion.
Portfolio Tracker
Track your Polymarket positions, monitor unrealized P&L, and manage your prediction market portfolio. All data stored locally in your browser.
Platform Comparison
Side-by-side comparison of the top prediction market platforms: Polymarket, Kalshi, Metaculus, Manifold, and PredictIt. Fees, features, liquidity, and more.
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