statistics calculators

Solve common statistics problems with unit-aware steps.

Z-Score Calculator

Standardize a value using a population mean and standard deviation.

Calculate count, sum, mean, median, Q1, Q3, IQR, modes, range, population/sample variance, and standard deviation from pasted data.

Calculate factorials, permutations, combinations, and repeated selections exactly with large integers.

Calculate event unions, conditional probability, Bayes' theorem, binomial probabilities, and normal-distribution areas.

Paste x,y or CSV data to calculate slope, intercept, Pearson r, R², residuals, predictions, and a scatter plot.