NettoMasse

Nettomasse, or net mass, is the mass of the contents of a product excluding packaging, containers, and any tare. It is the amount that buyers typically expect to receive when purchasing the product. Nettomasse is used in labeling, pricing, and inventory to distinguish the product from its packaging, which contributes to Bruttomasse (gross mass). The difference between the two is called tare, the weight of the empty container or packaging that must be subtracted to obtain the net mass.

In practice, the net mass is measured with a scale and expressed in SI units such as kilograms or grams. Standards and consumer protection laws in many jurisdictions require that the net mass be stated on the packaging for solids and liquids, ensuring transparency for price comparisons and inventory management. For liquids, the net content may also be stated separately, but the mass is typically equivalent to the net weight if density is known.

Typically, Nettomasse refers to the physical quantity of matter, not to price or nutritional content, though labeling practices vary by region and sometimes the term net weight is used in English-language packaging. The concept forms part of broader metrology and commercial labeling practices that distinguish the quantity of product from the packaging.