You could just assign the value to a constant directly...

Const PI = 3.14159265358979

Or you can let VB calculate it for you...

PI = 4 * ATN(1)

--
Rick (MVP - Excel)


"Prof Wonmug" wrote in message
...
What's the best way to get the most accurate value for pi in a VBA
function?

Excel 2007 has a pi() worksheet function, but there doesn't appear to
be a corresponding VBA function. The best I could come up with is

C = 2 * Application.WorksheetFunction.Pi() * R

That works, but it's a litte messy.