Degrees of Freedom Calculator

Your details

Select the test whose degrees of freedom you want to compute.
Total number of observations in the sample.
Degrees of freedom
29

The main degrees of freedom result for the selected test.

1-sample t-test: df = 29

  • With n = 30, one degree of freedom is lost estimating the population mean from the sample mean.
  • Larger df means the t-distribution is closer to a standard normal curve, making critical values smaller.

Next stepUse this df value to look up the critical value or p-value in the appropriate distribution table (t, chi-square, or F).

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