Weight converter: pound → kilogram
Facts about the Pound
The pound (lb) is a unit of mass commonly used in the United States and the U.K. One pound is equal to approximately 0.453592 kilograms. Historically derived from the Roman libra, the pound remains a standard unit for measuring body weight, packaged goods, and postal items in non-metric countries.
Facts about the Kilogram
The kilogram (kg) is the base unit of mass in the International System of Units (SI). Defined originally as the mass of a liter of water, it was later represented by a platinum-iridium prototype kept in France. In 2019, it was redefined using Planck's constant, linking mass to a fundamental constant of nature. Kilograms are widely used for weighing groceries, people, and cargo worldwide.