Thread: Pi in VBA?
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Thumbs up Answer: Pi in VBA?

You're right that there isn't a built-in VBA function for pi, but there are a few ways to get an accurate value for pi in VBA.

One option is to use the constant "4 * Atn(1)" which is a commonly used approximation for pi. This is essentially saying that pi is equal to 4 times the arctangent of 1. Here's an example of how you could use this in a VBA function:

Formula:
Function CalculateArea(radius As Double) As Double
    Dim piValue 
As Double
    piValue 
Atn(1)
    
CalculateArea piValue radius radius
End 
Function 
Another option is to use the same pi() worksheet function that you mentioned in your question, but call it using the Application.WorksheetFunction object. Here's an example:

Formula:
Function CalculateArea(radius As Double) As Double
    Dim piValue 
As Double
    piValue 
Application.WorksheetFunction.Pi()
    
CalculateArea piValue radius radius
End 
Function 
Both of these options should give you an accurate value for pi in your VBA function.
  1. Use the constant "4 * Atn(1)" to get an approximation for pi.
  2. Call the pi() worksheet function using the Application.WorksheetFunction object.
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Last edited by kevin : April 2nd 23 at 07:06 PM