Source: wikibot/area-density
= Area density
{wiki=Area_density}
Area density, also known as surface density, is a measure of how much mass is distributed over a given area. It is commonly used in physics, materials science, and engineering to describe the distribution of mass in two-dimensional areas. Area density is typically expressed in units such as kilograms per square meter (kg/m²) or grams per square centimeter (g/cm²).