PI Function (DAX)
Returns the value of Pi, 3.14159265358979, accurate to 15 digits.
PI()
Return Value
A number (R8).
Remarks
Pi is a mathematical constant. In PowerPivot, Pi is represented as a real number accurate to 15 digits, the same as Excel.
Example
The following formula calculates the area of a circle given the radius in the column, [Radius].
=PI()*([Radius]*2)