๐Chi-Square Test Calculator
Run goodness-of-fit and independence tests with full per-cell working.
Enter observed and expected frequencies (one row per category)
Free Chi-Square Test Calculator
Testing whether your data fits an expected pattern, or whether two categorical variables are related? Our free chi-square test calculator handles both goodness-of-fit and independence (contingency table) tests, giving you the chi-square statistic, degrees of freedom, and p-value instantly.
For goodness-of-fit, enter your observed and expected frequencies; for independence, build a contingency table and the expected frequencies are calculated automatically from the row and column totals. Every cell's contribution to the chi-square statistic is shown, so you can see exactly where the biggest deviations come from, not just the final number.
Built for statistics coursework, survey analysis, and research. No sign-up, no downloads, completely free.