Hello Experts,

The longer my formula becomes, the harder it is for me to edit this. I think I'm to a point where I need a lookup formula for what I'm looking to accomplish.

Cell O19, is using this formula

=IF(COUNT(O17:Q17)=2,"Bag Size: "&ROUND(((O17*PI())/2+1), 0)&"""W x "&Q17+O17+5&"""L","")

Cell O17, always wants a diameter value. But there are times, were I know my circumference and not the diameter.

What I am planning, is putting a drop down into cell O16, "Diameter" & "Circumference" will be the only two choices.

This is far beyond my knowledge of formulas, so I have no idea how to update my formula, to accommodate for the change of cell O16.

For example...

If cell O16 says "Diameter", then my formula up above will be used.

BUT

If cell O16 says "Circumference", this new formula needs to be used.

=IF(COUNT(O17:Q17)=2,"Bag Size: "&ROUND(((O17/PI())/2+1), 0)&"""W x "&Q17+O17+5&"""L","")

The only thing that changed, is the * into / before my PI() function.

I'm hoping that someone can help me along with this.

Thank you in advance for your help!

~ Geekamo