The pound (lb) is an imperial unit of mass equal to exactly 0.45359237 kilograms, serving as the primary weight unit in the United States and parts of the British Commonwealth. Body weight, gym equipment, and packaged goods in America are almost always labeled in pounds. One pound equals 16 ounces or roughly 0.4536 kilograms.

The jin (斤) is a traditional Chinese unit of weight equal to 500 grams, or exactly half a kilogram. It remains the most common weight unit in Chinese markets, groceries, and daily life, where vegetables, meat, and fruit are sold by the jin. One jin equals 1.1023 pounds or exactly 500 grams.