Probability
Explore probabilities and odds with clear event definitions.
Equally Likely Outcomes Probability Calculator
Calculate event probability from a count of favorable and total equally likely outcomes.
Open toolConditional Probability Calculator
Calculate a conditional probability from joint event probability and the conditioning event probability.
Open toolJoint Probability Calculator
Calculate joint probability using the probability of B and the probability of A conditional on B.
Open toolIndependent Events Calculator
Calculate the chance that all independent events occur, or that at least one occurs.
Open toolBayes Theorem Calculator
Calculate a posterior probability for two exhaustive hypotheses using supplied likelihoods.
Open toolProbability Odds Calculator
Convert probability odds in favor into event probability and percentage.
Open toolProbability to Odds Converter
Convert a probability into the favorable and unfavorable parts of odds in favor.
Open toolGeometric Distribution Calculator
Find the chance that the first independent success occurs on a chosen trial.
Open toolExponential Distribution Calculator
Calculate exponential waiting-time density, cumulative probability and survival probability.
Open toolContinuous Uniform Distribution Calculator
Calculate density and cumulative probability for a continuous uniform interval.
Open toolComplement Probability Calculator
Calculate the complement of a supplied event probability.
Open toolEvent Union Probability Calculator
Calculate the probability of either event using their supplied overlap.
Open toolNormal Probability Density Calculator
Calculate normal density for supplied mean and standard deviation.
Open toolPoisson Zero Events Probability Calculator
Calculate the chance of zero events in a Poisson model from the expected event count.
Open toolBinomial Probability Calculator
Find the probability of exactly or at most a chosen number of independent successes.
Open toolCoin Flip Probability Calculator
Calculate the chance of exactly a chosen number of heads with a stated heads probability.
Open toolPoisson Calculator
Find the probability of an event count under a Poisson model with a stated expected count.
Open toolNegative Binomial Calculator
Find the probability of a chosen number of failures before a stated number of independent successes.
Open toolHypergeometric Calculator
Calculate the probability of a success count when sampling without replacement.
Open toolCard Probability Calculator
Find the probability of drawing matching cards without replacement from a stated deck composition.
Open tool