Critical Value Calculator

This quick calculator allows you to calculate a critical value for the z, t, chi-square, f and r distributions.

Critical Value for T

Select your significance level (1-tailed), input your degrees of freedom, and then hit "Calculate for T".

Significance Level:

Degrees of Freedom:

Critical Value for Z

Select your significance level (1-tailed), and then hit "Calculate for Z".

Significance Level:

Critical Value for Chi-Square

Select your significance level, input your degrees of freedom, and then hit "Calculate for Chi-Square".

Significance Level:

Degrees of Freedom:

Critical Value for F

Select your significance level (1-tailed), input your degrees of freedom for both numerator and denominator, and then hit "Calculate for F".

Significance Level:

Degrees of Freedom (Numerator):

Degrees of Freedom (Denominator):

Critical Value for R

Select your significance level (1-tailed), input your degrees of freedom (n - 2), and hit "Calculate for R".

Significance Level:

Degrees of Freedom:

About Critical Values

A critical value is a point on the test distribution that is compared to the test statistic to determine whether to reject the null hypothesis. If the absolute value of your test statistic is greater than the critical value, you can declare statistical significance and reject the null hypothesis.