Try this. Should work.

Also, the spreadsheet is 2 sheets, I forgot to mention. Information on first sheet, calculation on second.

Very interesting and useful. However with a little bit more work I think it could be even better:

* put in your assumptions on the first sheet so the user knows what Epoxy system and coverage your calculations are based on

for example - how much epoxy per square foot/glass weight do you use in your calculation?

* allow the user to input an overlap amount for the wrap

* output epoxy values in metric as well

* allow user to modify the waste factor for epoxy (I see you are using the formula that West System uses which provides for a 15% waste factor)

* using the West formula I get that the volume (by oz) should be 7.33oz yet you put that as the weight and have a different amount by volume. Might double-check that calculation

More importantly West systems has the following guidelines:

"Dispensing without Mini Pumps (Weight/volume measure) - To measure 105 Resin and 205 or 206 Hardener by weight or volume, combine five parts resin with one part hardener. To measure 105 Resin and 207 or 209 Hardener by volume, combine three parts resin with one part hardener (by weight, 3.5 parts resin-1 part hardener)." So the ratios vary by that hardener used.

But even as is it's a great resource that folks can use to get started. I was able to modify it very easily to get what I wanted.

Tony