SamT --

only converting to Decimal when placing the results on the sheet and without even that conversion and saw no difference.
I would think that if all the internal calculations were done with 'low' precision Doubles, then converting that to 'higher' precision Decimal at the end would not show additional precision

I'd kind of leaning towards thinking that the Log() function will only return Double level precision, so I doubt that using Decimals will offer any improvement


As an aside, there is an add-in that allows up to 32760 digits to the right of the decimal point. I never needed that to balance my checkbook, but as an old retired math major, I found it interesting

www.thetropicalevents.com/Xnumbers60