The calculation of product weight is usually based on the density and volume of its material. First, you need to determine the net weight of the product, that is, the weight after removing the packaging and accessories.

Then, calculate its volume based on the shape and size of the product, and multiply the volume by the density of the material to get the weight of the product.

In addition, you need to take into account the weight that may be added during packaging and transportation to ensure that the total weight of the product is accurately calculated. Finally, you can use weighing equipment to verify the results of the calculation. In summary, the correct calculation of product weight requires consideration of factors such as material density, size and packaging.