Input observed values for a 2×2 contingency table to calculate chi-square statistic, degrees of freedom and P-value. Client-side only — your data stays private.
The Chi-Square (χ²) test is one of the most widely used hypothesis testing methods in statistics. Enter observed values for a 2×2 contingency table to automatically calculate the chi-square statistic, degrees of freedom and P-value. 📐 No sign-up · Client-side calculation
The Chi-Square Test Calculator is a free online statistical tool that runs entirely in your browser — no software installation required. Your data is processed locally and never uploaded to any server. Works on all major browsers and mobile devices. This tool helps you quickly perform independence tests and goodness-of-fit analyses. All processing happens client-side for fast, secure, and reliable performance.