This article shows the property mass in relation to an area. For the mass in relation to a distance see weight per meter
As mass density , also mass coating , mass coating , mass per unit area , mass per unit area or basis weight is the ratio of mass and surface of a layer. The SI unit of mass occupancy is kg / m² .
In the paper and printing industry as well as in the fabric processing industry, the terms square meter weight and grammage are common, given in g / m².