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Molbiotools is a collection of free online apps:

DNA Sequence Tools	Restriction Analyzer Silent Mutator Random Sequence Generator
Text and Data Tools	Target Text Extractor Multiple List Comparator List Operations Table Operations Two-table Operations Random Gene Set Generator
Lab Calculators	DNA Calculator Chemical Calculator Buffer Calculator Centrifugation
Math Calculators	Combinatorics Poisson Distribution Binomial Distribution Hypergeometric Distribution Geometric Distribution Negative Binomial Distribution

Geometric Distribution Calculator

A free online tool for calculating probabilities of events following geometric distribution.

The geometric distribution gives the probability that the first occurrence of a success requires x independent trials, each with the success probability p. The probability P that the x-th trial is the first success is described by the formula:

P(X=x)

p(1-p)^x-1

x>0, 0<p<1

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Calculate

Calculator

Probability of success in one trial:p =

P(X = x):

P(X ≤ x):

P(X ≥ x):

Mean: