Returns the standard deviation of the entire population.




Term Definition
columnName The name of an existing column using standard DAX syntax, usually fully qualified. It cannot be an expression.

Return value

A number representing the standard deviation of the entire population.


  • STDEV.P assumes that the column refers to the entire population. If your data represents a sample of the population, then compute the standard deviation by using STDEV.S.

  • STDEV.P uses the following formula:

    √[∑(x - x̃)2/n]

    where x̃ is the average value of x for the entire population and n is the population size.

  • Blank rows are filtered out from columnName and not considered in the calculations.

  • An error is returned if columnName contains less than 2 non-blank rows

  • This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.


The following example shows the formula for a measure that calculates the standard deviation of the column, SalesAmount_USD, when the table InternetSales_USD is the entire population.

= STDEV.P(InternetSales_USD[SalesAmount_USD])