Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Chi-Square Test Calculator

Compute the chi-square (χ²) statistic from observed and expected frequencies to test goodness of fit or independence. Use it whenever you need to determine whether categorical data match a theoretical distribution.

Observed Frequency 1

Expected Frequency 1

Observed Frequency 2

Expected Frequency 2

Fill in the required fields to see your result.

Statistics

Chi-Square Test Calculator

Compute the chi-square statistic to test whether observed frequencies differ significantly from expected ones, or whether two categorical variables are independent. Use it for analyzing survey responses, genetic ratios, market research, and contingency tables.

Observed Values (comma separated)

Expected Values (comma separated)

Fill in the required fields to see your result.

Key differences

	Chi-Square Test Calculator	Chi-Square Test Calculator
Category	Statistics	Statistics
Inputs required	4	2
Result	Chi-Square Statistic	Chi-Square Statistic
What it does	Compute the chi-square (χ²) statistic from observed and expected frequencies to test goodness of fit or independence. Use it whenever you need to determine whether categorical data match a theoretical distribution.	Compute the chi-square statistic to test whether observed frequencies differ significantly from expected ones, or whether two categorical variables are independent. Use it for analyzing survey responses, genetic ratios, market research, and contingency tables.