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Statistical function

NORM.INV Function

Returns the X value from a normal distribution, given a cumultive probability. 

by Charley Kyd, MBA
Microsoft Excel MVP, 2005-2014
The Father of Spreadsheet Dashboard Reports

This function replaces the NORMINV function.

The NORM.DIST function returns the inverse of this function. That is, given the X value, mean, and standard deviation of a normal curve, NORM.DIST returns either the cumulative or non-cumulative probability value.



  • probability A probability from the normal distribution.
  • mean  The arithmetic mean of the normal distribution.
  • standard_dev   The standard deviation of the normal distribution.

Applies To

Excel 2007 and above.


  • All values must be numeric.
  • The probabiity must be betwen 0 and 1, inclusive.
  • The standard deviation must be greater than zero.
  • If the mean equals zero and the standard deviation equals 1, NORM.INV uses the standard normal distribution. (See NORM.S.INV.)


Examples of Excel's NORM.INV worksheet function.

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