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 × (0.45359237 / 1)One pound is 0.45359237 kilograms, so multiply pounds by 0.45359237. NIST footnote 22 defines the international avoirdupois pound as exactly that mass. Gym plates and package labels may list pounds, while science uses kilograms. A 150 lb person is about 68.04 kg. Dividing by 2.2 gives about 68.18 kg, a gap of 0.14 kg, so use the full factor when precision matters.
Source: NIST exact and named mass definitions (definition-derived arithmetic)
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
Example: a 150 lb adult's body weight.
150 lb = 68.0388555 kg
A 200 lb squat in a US gym.
200 lb = 90.718474 kg
An 8 lb newborn's birth weight.
8 lb = 3.62873896 kg
A 50 lb bag of dog food.
50 lb = 22.6796185 kg