#Probability

Tagged with “Probability”

28 calculators · 0 articles

Calculators and explainers tagged under Probability.

Calculators

Statistics / Probability

Expected Value of a Discrete Distribution Calculator

Calculates the expected value E[X] = Σ xᵢ·P(xᵢ) and variance Var[X] = Σ(xᵢ−μ)²·P(xᵢ) for a discrete probability distribu...

basic

24,673 4.1 1 min

Statistics

Binomial Distribution PMF & CDF Calculator

Calculates the binomial probability mass function P(X = k) and cumulative distribution P(X ≤ k) from trials n, success p...

basic

24,520 4.4 1 min

Statistics / Probability

Negative Binomial Distribution Mean Calculator

Calculates the mean and variance of a negative binomial distribution from the number of required successes r and success...

basic

24,511 4.5 1 min

Other / Games

Dice Probability Calculator

Compute the probability of rolling exactly, at least, or at most a chosen sum on N fair dice with S sides each.

basic

23,083 4.4 1 min

Statistics

Negative Binomial Failures Before k-th Success

Calculates the probability of exactly r failures before the k-th success in independent Bernoulli trials using the negat...

basic

21,531 4.9 1 min

Statistics / Probability

Bayes Theorem Posterior Update Calculator

Applies Bayes' theorem to update a prior probability with new evidence, outputting the posterior probability and likelih...

basic

21,201 3.9 1 min

Other / Randomness

Random Number Generator

Generate one or more random integers in a chosen range, with optional uniqueness and optional sorting.

basic

20,890 4.6 1 min

Statistics / Probability

Discrete Uniform Distribution Probability Calculator

Calculates probability mass, mean μ = (a+b)/2, variance σ² = (n²−1)/12, and P(X ≤ k) for a discrete uniform distribution...

basic

20,835 4.4 1 min

Math

Poisson Probability Calculator

Compute the Poisson probability of observing exactly k events when the average rate is λ events per interval.

basic

20,679 4.0 1 min

Statistics / Probability

Binomial Distribution Exact Probability (PMF) Calculator

Calculates the exact binomial probability P(X = k) = C(n,k) · pᵏ · (1−p)^(n−k), the mean μ = n·p, and standard deviation...

basic

18,952 3.9 1 min

Statistics

Poisson Distribution Event Rate Calculator

Calculates the Poisson PMF and CDF from event rate λ and number of events k for modelling rare events in a fixed time/sp...

basic

18,764 4.0 1 min

Statistics

Geometric Distribution First-Success Trial Calculator

Calculates the probability of achieving the first success on exactly the k-th trial in a geometric distribution, plus me...

basic

18,228 4.8 1 min

Statistics / Probability

Permutation & Combination Calculator

Count how many ways to choose or arrange r items from a set of n — both nPr and nCr, with a short breakdown of why they...

basic

17,614 4.0 1 min

Math

Expected Value, Variance, and σ of a 3-Outcome Discrete Distribution Calculator

Given a discrete random variable with three outcomes x₁, x₂, x₃ and corresponding probabilities p₁, p₂, p₃ (summing to 1...

basic

16,499 4.3 1 min

Math / Percentage

Odds to Probability Converter

Convert betting odds expressed as "X to Y for the event" into the implied probability of the event occurring, with the c...

basic

15,197 4.7 1 min

Math

Binomial Probability Calculator

Compute the binomial probability of getting exactly k successes in n independent trials, each with probability of succes...

basic

14,938 4.4 1 min

Math

Conditional Probability P(A | B) Calculator

Compute the conditional probability P(A | B) from the joint probability P(A ∩ B) and the marginal P(B). Reports P(B | A)...

basic

13,881 4.5 1 min

Statistics / Probability

Geometric Distribution Mean Calculator

Calculates the mean and variance of a geometric distribution modelling the number of trials until the first success.

basic

13,051 4.5 1 min

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Tagged with “Probability”

Calculators

Expected Value of a Discrete Distribution Calculator

Binomial Distribution PMF & CDF Calculator

Negative Binomial Distribution Mean Calculator

Dice Probability Calculator

Negative Binomial Failures Before k-th Success

Bayes Theorem Posterior Update Calculator

Random Number Generator

Discrete Uniform Distribution Probability Calculator

Poisson Probability Calculator

Binomial Distribution Exact Probability (PMF) Calculator

Poisson Distribution Event Rate Calculator

Geometric Distribution First-Success Trial Calculator

Permutation & Combination Calculator

Expected Value, Variance, and σ of a 3-Outcome Discrete Distribution Calculator

Odds to Probability Converter

Binomial Probability Calculator

Conditional Probability P(A | B) Calculator

Geometric Distribution Mean Calculator

Articles