Free calculators to help you trade smarter. Profit, odds, Kelly criterion, EV, and arbitrage.
Calculate your exact profit, loss, and ROI before placing a trade on any prediction market platform.
Convert between prediction market cents, American odds, decimal odds, fractional odds, and implied probability.
Calculate the optimal bet size using the Kelly Criterion to maximize long-term growth of your prediction market bankroll.
Determine whether a prediction market trade has positive expected value before you invest.
Find arbitrage opportunities across prediction market platforms where you can guarantee a profit regardless of outcome.
Compare prices on the same market across multiple prediction market platforms. Find the best deals and spot arbitrage opportunities.
Track historical accuracy and calibration for each prediction market platform. See which platforms resolve markets most reliably.
