The standard unit of measurement for weight in the metric system is the kilogram (kg). The metric system is used internationally for scientific and everyday measurements. It simplifies conversions due to its base-10 structure. The kilogram is defined by the International System of Units (SI) and is equivalent to 1,000 grams. It's commonly used to measure the weight of objects in various fields, including science, commerce, and health. As a fundamental unit, it plays a crucial role in standardizing measurements across different regions and disciplines, facilitating clearer communication and comparison of weight.