The pound is a unit of mass used in imperial and United States customary systems. One international pound is exactly 0.45359237 kilograms.
The pound and its lb symbol derive from the Roman libra. The modern avoirdupois pound was internationally standardized in 1959.
Measurement system: Imperial and US customary systems. SI equivalent: 1 lb = 0.45359237 kg.
Pound facts
- Unit name
- Pound
- Symbol
- lb
- Category
- Mass
- Measurement system
- Imperial and US customary systems
- SI equivalent
- 1 lb = 0.45359237 kg
- Common uses
- Retail, shipping, nutrition labels and industrial catalogs
Definition of the pound
The pound is a unit of mass used in imperial and United States customary systems. One international pound is exactly 0.45359237 kilograms.
Measurement system and SI relationship
Imperial and US customary systems
SI equivalent: 1 lb = 0.45359237 kg
History of the pound
The pound and its lb symbol derive from the Roman libra. The modern avoirdupois pound was internationally standardized in 1959.
Where is the pound used?
Retail, shipping, nutrition labels and industrial catalogs