Which also makes it quite nice to know how much a sheet of paper weighs. At 80 g/m² you'll get 5 g (80 / 2⁴) for A4. Handy for quickly determining how much post

Which also makes it quite nice to know how much a sheet of paper weighs. At 80 g/m² you'll get 5 g (80 / 2⁴) for A4. Handy for quickly determining how much postage to put on an envelope based on how many pages you put inside it.