Pound (lb)
The avoirdupois pound (lb) is exactly 0.45359237 kg. It is the everyday unit of weight in the United States.
Symbol: lb
Quantity: mass (commonly called weight)
SI relation: 1 lb = 0.45359237 kg (exact)
Derivation: 1 lb = 0.45359237 kg (exact, 1959 international agreement)
Exact: yes, by definition
Reference conditions. Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Typical uses
- Body weight and food in the US
- Shipping weights and payloads
- Weightlifting and gym equipment
Convert pounds to other units
| Conversion | 1 lb equals | Reverse |
|---|---|---|
| pound to kilogram | 0.45359237 kg | kilogram to pound |
| pound to gram | 453.59237 g | gram to pound |
| pound to milligram | 453592.37 mg | milligram to pound |
| pound to ounce | 16 oz | ounce to pound |
| pound to microgram | 453592370 µg | microgram to pound |
| pound to metric ton | 0.00045359237 t | metric ton to pound |
| pound to stone | 0.07142857143 st | stone to pound |
| pound to short ton | 0.0005 ton (US) | short ton to pound |
| pound to troy ounce | 14.58333333 oz t | troy ounce to pound |
| pound to long ton | 0.0004464285714 ton (UK) | long ton to pound |
| pound to grain | 7000 gr | grain to pound |
| pound to carat | 2267.96185 ct | carat to pound |
Open the Weight and Mass Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound (avoirdupois) (lb)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Pound (lb). Retrieved October 17, 2026, from https://scientificconverters.com/units/pound/
IEEE
Scientific Converters, "Pound (lb)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/pound/