Author: Oscar Cronquist Article last updated on May 11, 2022

The CHISQ.INV function was introduced in Excel 2010 and calculates the inverse of the left-tailed probability of the chi-squared distribution. It has replaced the CHIINV function.

Formula in cell C6:


Excel Function Syntax



probability Required. A numerical value representing the probability of the chi-squared function distribution.
deg_freedom Required. A numerical value representing the degrees of freedom.


The CHISQ.INV function returns

  • #VALUE! error value if probability or deg_freedom argument is non-numeric.
  • #NUM! error value if:
    • probability < 0 (zero)
    • probability > 1 (zero)
    • deg_freedom  < 1

deg_freedom argument is converted into integers if necessary.