Paper density may be expressed in grams per square meter (GSM).
Synonym: grammage
Parameters:
(1) weight in grams of a square meter of the paper
(2) weight of a sheet of the paper of known dimensions
1 square meter = 10,000 square cm
weight of 1 square meter =
= (weight of 1 sheet in grams) * (10,000) / (area of sheet in square cm)
weight of 1 sheet =
= (weight of 1 square meter) / (number of sheets made from 1 square meter)
area of 1 sheet =
= (10000) / (number of sheets)
number of sheets from 1 square meter =
= (weight of 1 square meter) / (weight of 1 sheet)
