weightgrammage

Weightgrammage is a term that appears informally in some industrial and packaging contexts to describe the weight per unit area of a material. It blends the ideas of weight and grammage, but it is not a widely standardized technical term. In many situations, it is used interchangeably with grammage, especially when the emphasis is on the mass per area rather than thickness or structural properties alone.

Measurement of weightgrammage follows the same basic principle as grammage. It is defined as the mass of a material divided by its surface area: WG = m / A. When mass is measured in grams and area in square meters, the unit is grams per square meter (g/m^2); if mass is in kilograms, the unit is kilograms per square meter (kg/m^2). In practice, if a sample has mass m and area A, its weightgrammage equals grammage regardless of terminology, provided the mass units align with the area units.

Relation to standard terms is important. Grammage is the established term for mass per unit area in papers, textiles, films, and related materials. Weightgrammage often overlaps with grammage and may simply reflect a consumer- or vendor-facing way to express the same concept. Because it is not standardized, users are advised to prefer grammage or basis weight in formal specifications to avoid ambiguity.

Applications include quality control and product specification for papers, packaging materials, textiles, and films. An example: a sheet weighing 0.3 kg with an area of 0.5 m^2 has a weightgrammage of 0.6 kg/m^2, equivalent to 600 g/m^2.