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Bayes' theorem calculator →

Find the probability of an event after positive evidence. Enter three percentages for an instant result.

Calculate the volatility and variance of a two-asset portfolio.

Estimate the chance of reaching a loss limit over a set number of trades.

Find the average outcome, variance and standard deviation of a probability table.

Find the annualized volatility implied by a call or put option price.

Calculate compounded performance and the largest decline from a prior peak.

See how turnover and transaction costs change a return path.

Run short Python experiments in the browser.

Explore binomial probability and uncertainty.

See how sampling error changes with more draws.

Compare analytic and simulated European option prices.

Check date order, units and missing values locally.