A pound (lb) is a unit of weight in the U.S. customary and imperial systems of measurement. There have been a number of definitions of the pound used in the past, but the current definition used in the US is referred to as the international avoirdupois pound. This is the definition of the pound we will be using whenever we use the term "pound."
The pound is still widely used in the United States, since the US has not yet adopted the metric system. In the UK, the pound is also still used, though the UK uses the pound alongside metric units. Outside of the US, the UK, and their territories, the pound is not really used. Most countries use the kilogram (kg), the base unit of mass in the International System of Units (SI). Note that in conventional usage, the term "weight" is used to mean mass. Refer to the weight page for clarification.
In terms of kilograms:
1 pound = 0.45359237 kilograms
1 kilogram = 2.20462101 pounds
1 pound = 16 ounces
2000 pounds = 1 ton
Pounds are commonly used to measure body weight; ounces may be used for measuring amounts of food; tons are used for measuring larger objects, such as cars.
Did you know?
The abbreviation lb comes from libra, a Latin word meaning pound.
Also, the pound is used as a unit of currency in some nations such as the United Kingdom, Egypt, Lebanon, and a number of other countries.