> A4 is 1/24 m2, so a sheet of 80gsm paper in A4 size weighs exactly 80/24 or 5g. I hope they were more precise with the maps than they were with the calculati

> A4 is 1/24 m2, so a sheet of 80gsm paper in A4 size weighs exactly 80/24 or 5g. I hope they were more precise with the maps than they were with the calculations (A4 is 1/16 m2, and then 80/16=5). :)