GSM stands for Grammes per Square Metre - and is how the quality of paper is measured. Normal office paper is either 60 or 80 grammes - good quality paper would be 100 to 120 grammes. Paper density is a term used in the pulp and paper industry to denote a measure of mass of the product per unit of area for a type of paper or paperboard.
Two ways of expressing paper density are commonly used:
Expressed in grams per square meter (g/m²), paper density is also known as grammage. This is the measure used in most parts of the world.
Expressed in terms of the mass (expressed as weight) per number of sheets, it is known as basis weight. The convention used in the United States and a few other countries using US paper sizes is pounds of a ream of 500 (or in some cases 1000) sheets of a given (raw, still uncut) basis size. Japanese paper is expressed as the weight in kg of 1000 sheets.
The GSM of paper is the thickness of paper that is measured in a roundabout way. The more paper weighs, the thicker it is. The advanced online GSM of Paper Calculator is used to calculate the weight of paper in grams per square meter.
Calculate the GSM weight of paper for the given details.
Weight of reel in kgs = 25
Length of paper in meter = 30
Reel width in cms = 15
Substance in gsm = (Weight of reel in kgs * 100000)/(Length of paper on meter * reel width in cms)
Substance in gsm = (25*100000)/ (30 *15)
Substance in gsm = 2500000/450 = 5555.555555555556
Substance in gsm = 5555.555555555556 (gsm)