Chi-Square Calculator

Enter observed and expected counts or a contingency table to calculate chi-square, degrees of freedom, and the right-tail p-value.

Mode

Observed, expected per line

—χ² statistic

—Degrees of freedom

—Right-tail p-value

—Total count

—Expected counts should generally be positive.

How to use this Chi-Square Calculator

Run chi-square goodness-of-fit or independence calculations. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.