below i have a bill of material with the quantity field linked to the SF equation. in the equation "Evaluates to" shows the answer in 3 decimal places, however, the bill shows it in 6. i cant for the life of me, figure out how to make it show in 3 decimal places. is this even possible?

You can round the value to the number of decimal places you want. I don't know if you want to add a second variable for the rounded value or to try to put it all in one equation. This is what we do to set our part volume to 1 decimal place:

= round ( "SW-Volume" , 1 )