The Chi-Square Distribution Calculator determines the p-value corresponding to a given chi-square statistic and degrees of freedom. It helps evaluate whether the observed data significantly differ from the expected results in hypothesis testing. Commonly used in tests such as the Chi-Square Test for Independence and Goodness of Fit, this calculator allows users to choose between left-tailed or right-tailed tests to analyze the probability of observing a chi-square value as extreme as the one calculated, helping assess statistical significance and model fit.