Probability Calculator
Permutation/combination probability, binomial and normal distribution calculations.
Calculate the probability of choosing k out of n
Usage Instructions
Features
The probability calculator provides three modes — basic probability (hypergeometric), binomial distribution and normal distribution — supporting quick computation of probability density and cumulative probability, ideal for statistics study and data analysis.
Steps
Switch calculation modes via the top tabs → Fill in the corresponding parameters (n, k, p, μ, σ, etc.) → Results update in real time, showing probability values and formula details.
Notes
All calculations run locally in the browser; the binomial success probability p must be between 0 and 1, and the normal distribution standard deviation σ must be greater than 0; results keep 8 decimal places.