Enter the first variance and the second variance into the Calculator. The calculator will evaluate the F Critical Value. 

F Critical Value Formula

F = s1^2 / s2^2


  • F is the F Critical Value ()
  • S1 is the first variance
  • S2 is the second variance

To calculate F Critical Value, square the first variance then divide by the square of the second variance.

How to Calculate F Critical Value?

The following steps outline how to calculate the F Critical Value.

  1. First, determine the first variance. 
  2. Next, determine the second variance. 
  3. Next, gather the formula from above = F = s1^2 / s2^2.
  4. Finally, calculate the F Critical Value.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

first variance = 1

second variance = 0.9