Pounds (lbs) to Kilograms (kg) Converter
Enter a value to instantly convert between weight units.
1 Pound = 0.4536 Kilogram
Key Formulas
Kilogram → Pound
lb = kg × 2.20462Pound → Kilogram
kg = lb × 0.453592Gram → Ounce
oz = g × 0.035274Ounce → Gram
g = oz × 28.3495Formula
kg = lb × 0.453592The pound is the standard unit of weight in the United States, used daily for body weight, groceries, and packages. The kilogram is the global standard everywhere else, and it's what international medicine, sports federations, and shipping carriers use. Knowing your weight in kilograms matters whenever you fill out a form outside the US, calculate a medication dose, or enter a competition with metric weight classes.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A patient filling out a form at an international clinic is asked for their weight in kilograms — they only know they weigh 150 lbs.
150 lb = 68.04 kg
An American football player weighing 200 lbs wants to know his weight class for an international powerlifting competition, which uses kg categories.
200 lb = 90.72 kg
A newborn's birth weight was recorded as 8 lbs; the grandparents in another country asked what the baby weighed in kilograms.
8 lb = 3.63 kg
A US domestic shipping label shows the box weighs 50 lbs; an international freight forwarder needs the equivalent in kg for customs documentation.
50 lb = 22.68 kg