Gsm to density.

[Gauravgala]

Please could anyone help me how to calculate from gsm to density .

[JohnS]

Please could anyone help me how to calculate from gsm to density .

Gsm = g/m². Divide by the thickness (expressed in meters) to get grams per cubic meter. It would be customary to then divide by 1000 to get kg/m³, the usual unit for density.

To combine operations into one step, express the thickness in millimeters and divide. The only problem is the uniformity of thickness over the sheet and whether you can measure the small thickness accurately enough.

[Gauravgala]

Sir could you give me an example please .

[JohnS]

Sir could you give me an example please .

Paper weighing 75 g/m² and 0.1 mm thick (I am making up the numbers, not sure about paper thickness)

75 g/m² / 0.1 mm = 750 kg/m³

[Gauravgala]

Sir for example it is 180 micron for the sheet and the gsm is 134.5

[JohnS]

Sir for example it is 180 micron for the sheet and the gsm is 134.5

180 µm = 0.181 mm. 134.5 g/m² / 0.181 mm = 743 kg/m³

[Gauravgala]

Sir i want to know the weight in gsm for one sheet if the size is mentioned in mm .
thickness is 180 micron & density is 0.7 .
size is 597 X 940 mm .

sir how much gsm ?

[JohnS]

Sir i want to know the weight in gsm for one sheet if the size is mentioned in mm .
thickness is 180 micron & density is 0.7 .
size is 597 X 940 mm .

sir how much gsm ?

I assume the units of density are 0.7 g/cm³ or 700 kg/m³. The areal dimensions of the piece don't matter as you are asking for gsm, but the thickness matters. Determine the volume of 1 square meter, then multiply by density in compatible units

1 m x 1 m x 180 x 10^-6 m = 0.000 18 m³
0.000 18 m³ 700 x 10³ g/m³ = 126 g/m² (aka "gsm")