1. Convert the dimensions of the sheet to inches:
   • Délka: 4 nohy = 48 palce
   • Šířka: 8 nohy = 96 palce
2. Convert the thickness to decimal form:
   • 3/16 inch = 0.1875 palce
3. Calculate the area of the sheet in square inches:
   • Area = Length x Width = 48 inches x 96 palce = 4,608 square inches
4. Calculate the volume of the sheet in cubic inches:
   • Volume = Area x Thickness = 4,608 square inches x 0.1875 palce = 864 krychlové palce
5. Convert the volume from cubic inches to cubic feet:
   • Volume (cubic feet) = Volume (krychlové palce) / 1728 = 864 krychlové palce / 1728 = 0.5 cubic feet
6. Determine the density of aluminum. The density of aluminum is typically around 0.098 libry na krychlový palec.
7. Multiply the volume in cubic feet by the density to calculate the weight in pounds:
   • Hmotnost (lbs) = Volume (cubic feet) x Density = 0.5 cubic feet x 0.098 lbs/in³ ≈ 0.049 lbs

Proto, a 4×8 3/16 hliníkový plech would weigh approximately 0.049 liber.