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Calculate the Pearson chi-square test of independence for an r×c contingency table. Get χ², df, p-value, critical value, Cramér's V, Phi (2×2), expected counts, standardized residuals, and step-by-step results.

Math Calculators

Chi-Square Test of Independence Calculator

Run a Pearson chi-square goodness-of-fit test from observed counts and expected frequencies or proportions. Get χ², df, p-value, critical value, contribution table, and step-by-step results.

Math Calculators

Chi-Square Goodness-of-Fit Calculator

Free chi-square calculator. Enter χ² and df for an upper-tail p-value, or df and α for a critical value. Includes a χ² distribution chart, a chi-square table calculator, and a Σ (O − E)²/E contribution calculator.

Math Calculators

$Convert dates to Julian Date, Julian Day Number, or Modified Julian Date, and convert JD, JDN, or MJD back to a calendar date. Includes Gregorian and Julian calendar conversion, ordinal codes, fractional time, and reference epochs.$

Math Calculators

Julian Date Converter

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Chi-Square Test of Independence Calculator

Chi-Square Goodness-of-Fit Calculator

Chi-Square Calculator

Two-Way ANOVA Calculator

One-Way ANOVA Calculator

Power Analysis Calculator

Sample Size Calculator

Slovin's Formula Calculator

Rent Affordability Calculator

Markup Calculator

Margin Calculator

Julian Date Converter