4x8 aluminum sheets weight calculation formula is as follows: length*width*thickness*2.7. Here we get the length of is 8 feet and width 4 feet. The units for there factors should be meter, meter and meter respectively. First you should transform the unit of feet into meter, but you need still to get the thickness of the sheet before coming to an answer. The number 2.7 refers to the density of pure aluminum, which is only a rough number, for the density of aluminium alloy sheets varies with their composition.
Alloys of current 4x8 aluminum sheets for sale include 1050, 1060, 1070, 1100, 2024, 2a14, 2104, 3003, 3004, 3005, 5005, 5052, 5083, 6061, 6082 and 7075, among which the density of 1000 series is the most close to pure aluminum. Other alloys, containing alloying metals like silicon, manganese, magnesium, copper etc., weighs slightly differently from pure aluminium. You need to refer to the density form with an alloy list as below.
If you have no idea about aluminium sheet weight, just remember you need to know the size of the sheet first. You can simply measure it with a ruler. If you just need a rough number, you can simply assume the density of the sheet as 2.71. If you need an accurate figure, figure out the alloy of the sheet and then refer to the density list.
The other way to obtain the 4x8 aluminum sheet weight or weight of any other aluminum sheet pieces is quite simple. Weigh the whole weight of a pile of aluminum sheets, and then divide the weight with the piece number. For example, if the weight of 100 pieces of sheets are 500kg, the individual weight of a sheet should be 5kg (100/500). If you are still unsure about the weight, stop trying by yourself and contact your supplier who will be able to give you an answer much sooner.