The Chi-Square Calculator performs chi-square goodness of fit tests, tests of independence on contingency tables, computes p-values from chi-square statistics, and looks up critical values for any degrees of freedom and significance level.
Enter your observed and expected frequencies or contingency table data to get instant results with step-by-step working, including the chi-square statistic, degrees of freedom, p-value, and significance conclusion.
Your calculations will appear here
Calculate probability of events, complements, unions, and intersections. Free online probability calculator for statistics.
Calculate standard deviation, variance, mean, and more for any dataset. Supports population and sample statistics. Free online tool.
Calculate z-scores, find values from z-scores, and determine probabilities. Free online z-score calculator with bell curve visualisation.
Calculate binomial probabilities, cumulative distributions, and expected values. Free online binomial distribution calculator with bar chart.
Calculate probabilities for normal distributions. Find areas under the bell curve, percentiles, and inverse values. Free online tool.
Calculate Pearson correlation coefficient, R-squared, and regression line. Free online correlation calculator with scatter plot.