Chi-Square Test

Calculate Pearson’s chi-square test or Fisher’s exact test using a customizable contingency table.

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INTRODUCTION

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Use this free calculator to examine whether two categorical variables are associated. Begin with a 2 × 2 table or add additional rows and columns to create a larger contingency table. The calculator reports the appropriate statistical test, p-value, expected frequencies, effect size, a plain-English interpretation, and manuscript-ready wording.

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IMPORTANT NOTE

Enter the number of observations in each category. Enter counts only—not percentages, proportions, means, or individual participant measurements.