Free Prediction Market Tools

Every tool on PolyMath is free, no account required. Built for forecasting research across Polymarket, Kalshi, and Metaculus.

Daily Market DeskNew

Your daily workflow for live market movement, source checks, AI analysis, TimesFM drift, EV, and Kelly sizing.

Kelly Criterion Calculator

Estimate a position size from your probability, market price, and bankroll assumptions.

Expected Value Calculator

Compare your probability estimate with the current market price and review expected value.

Arbitrage Scanner

Compare YES/NO prices and related events when market prices diverge across venues.

Parlay Builder

Chain up to 8 positions. See combined probability, payout multiple, and total expected value.

Calibration Tracker

Track your forecasting accuracy over time. Know whether your 70% predictions actually resolve YES 70% of the time.

Vig & Implied Probability CalculatorNew

Enter YES and NO prices to see the house edge, vig-adjusted probabilities, and what you need to break even.

Cross-Platform ComparisonNew

Search the same event across Polymarket and Kalshi. Compare implied probabilities side by side.

Drift RadarAI

Time-series AI forecast of where a Polymarket contract price may drift before resolution.

All tools are free forever. PolyMath does not take custody of funds and has no affiliation with Polymarket or Kalshi. Not financial advice.