Convert paper grammage between g/m², kg/m², mg/m², oz/yd² and lb/ft².
Grammage expresses mass per unit of area, used in paper, textiles, sheets and coatings. The gram per square metre (g/m²) is the most common unit; oz/yd² and lb/ft² appear in US standards. Select the units and enter a value. For example, 1 kg/m² equals 1,000 g/m². This tool converts mass per area; ream-based "basis weight" (500 sheets) depends on sheet size and is not covered here.