i have no clue where I got this formula years ago, but to find the fluid ounces per foot in beer line,
=CONVERT((PI()*((D/2)*(D/2)))*12,"in^3","oz")
where D is the inner diameter of the beer line. 6.3mm ID beer line (1/4") is .326, close to the often quoted 1/3 oz.
5 months ago