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 × 0.453592US scales, groceries, and parcels commonly use pounds, while medical forms, sports entries, and international shipping documents may require kilograms. Convert the measured pounds to kilograms before entering an explicitly metric field.
Source: NIST SP 811, Appendix B.9
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
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