Any amount you like. You can vary the thickness of the granite to get any mass per square metre. A super-thin wafer could weigh micrograms per sq metre while a block of granite several kilometres high but only 1 sq metre in cross section could have a mass of tons.
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Grams are a measure of weight, a square meter is a measure of area, and a cubic meter is a measure of volume. These are not comparable.
The weight of 4.2mm Aluminium Checker Plate is 1.02 Pounds/ Square Foot OR 4.98kg/ Square meter.
25KG
The gram is a measurement of weight, and the square meter is a measurement of area.Formula:Basis Weight (in pounds) x 1406.5Basis Size (in inches)= GRAMS PER SQUARE METERTo find the Basis Size, refer to the chart in the related link.Example:Convert 25" x 38", 60 lb. Offset Paper to grams per square meter.60 x 1406.525 x 38= 88.8 Grams per square meter
6mm chequered ms plate per square meter weight