Oppose the totally insane system used along with U.S. paper sizes: http://en.wikipedia.org/wiki/Paper_density#Basis_weight http://en.wikipedia.org/wiki/Paper_d

Oppose the totally insane system used along with U.S. paper sizes: http://en.wikipedia.org/wiki/Paper_density#Basis_weight http://en.wikipedia.org/wiki/Paper_density#Basis_weight In order to figure out the actual mass of a sheet of U.S. paper from the reported basis weight, you must know how many sheets of paper were in the "basis ream" and what dimensions they were. The basis ream sheet dimensions may have nothing to do with your final sheet of paper, and the number of sheets varies too.