When the gross weight and the net weight are known, the tare weight may be calculated by subtracting the net weight from the gross weight. Most containers should also have a plate stating their tare weight.
The tare weight is the weight of a container used in shipping. It may include packaging, such as cases, pallets or crates, and also vehicles. The net weight is the weight of the goods that are to be shipped, not including the packaging. The gross weight is the total weight, including the goods and the packaging. These numbers are often needed to calculate fees and taxes.