kilogram

A kilogram is a unit of mass in the metric system, equivalent to 1,000 grams. It is used worldwide to measure weight in various contexts, such as grocery shopping, cooking, and scientific research. The kilogram is also part of the International System of Units (SI) and is commonly represented by the symbol "kg." To put it in perspective, a standard liter of water weighs about one kilogram. Originally defined by a physical object, the kilogram is now precisely defined based on fundamental constants of nature, ensuring accuracy in measurements across different applications.