Probability

Bayes Theorem Calculator

Apply Bayes' theorem to calculate posterior probability from prior probability, likelihood, and false positive rate.

Combination Calculator

Calculate the number of ways to choose r items from n items without regard to order using the nCr formula.

Dice Probability Calculator

Calculate the probability of rolling a specific sum with one or more dice of any polyhedral type.

Permutation and Combination Calculator

Compute both permutations (nPr) and combinations (nCr) for chosen n and r values with formula display.

Permutation Calculator

Calculate the number of ordered arrangements of r items chosen from n items using the nPr formula.

Probability Calculator

Compute probability for single events, complements, and independent compound events (AND/OR) with decimal and percentage outputs.

Probability Distribution Calculator

Calculate probabilities for binomial, Poisson, normal, and uniform distributions from distribution parameters.