Prediction Market Tools
Free, interactive calculators and utilities for prediction market traders. All computations run in your browser — no data leaves your device.
Probability Calculator
Aggregate odds from multiple sources with weighted averaging, vig removal, and arbitrage detection.
Kelly Criterion Calculator
Compute optimal bet sizing based on your edge, bankroll, and risk tolerance.
Odds Converter
Convert between decimal, fractional, American, and implied probability formats.
ROI Calculator
Model profit/loss scenarios for prediction market positions at different exit prices.
Portfolio Simulator
Run Monte Carlo simulations on a portfolio of prediction market positions.
Market Comparison
Compare markets side-by-side on probability, volume, traders, and more.