The measurement used to quantify mass is typically expressed in kilograms (kg) or grams (g) in the metric system. Mass is a fundamental property of matter, indicating the amount of substance an object contains. It differs from weight, which is the gravitational force acting upon that mass. Accurate measurement of mass is crucial in scientific experiments, engineering, and various applications in everyday life. Precision balances and scales are commonly used to determine mass in laboratory and industrial settings, providing essential data for calculations in chemistry and physics.