Probability Calculator
Basic, complement, conditional, independent and dependent event probabilities with the rule used shown for each result.
Related tools
Bayes' Theorem CalculatorUpdate a probability with Bayes’ theorem from a prior, a true-positive rate and a false-positive rate, with the full working.Permutations & Combinations CalculatorExact nPr, nCr and factorials for large numbers, with and without repetition, using big-integer arithmetic.Binomial Distribution CalculatorBinomial probabilities P(X = k), P(X ≤ k) and P(X ≥ k) with mean, variance and the full probability chart.