Do not divide by 2 exactly
Dividing pounds by two is only a rough estimate. One pound is exactly 0.45359237 kilograms.
Unit converter
LBS to KG Converter
Convert pounds to kilograms instantly. Pounds for body weight and baggage. See the formula, worked examples and practical reference values.
How to convert lb to kg
Pounds to kilograms is useful for medical forms, travel limits, fitness tracking and product weights that require metric units.
Formula: kg = lb × 0.453592
Reverse formula: lb = kg × 2.204623
Worked example
1 lb = 0.453592 kg
- = 453.59237 g
- = 0.071429 st
- = 0.000454 t
Avoid these errors
Common mistakes
Mass pounds are not force measurements
Everyday body and luggage weights use avoirdupois pounds of mass; engineering pound-force is a different quantity.
Useful for: Body weight, luggage and product mass in kilograms.
Common lb to kg conversions
| pounds | kilograms |
|---|---|
| 1 lb | 0.453592 kg |
| 5 lb | 2.267962 kg |
| 10 lb | 4.535924 kg |
| 25 lb | 11.339809 kg |
| 50 lb | 22.679619 kg |
| 100 lb | 45.359237 kg |
| 150 lb | 68.038856 kg |
| 200 lb | 90.718474 kg |
About the units
A pound is an imperial unit represented by lb. A kilogram is a metric unit represented by kg. Calculations use the same authoritative registry as the full weight converter, retaining full precision until display.
Sources and definitions
NIST — SI units and conversion guidance
Conversion constants come from the shared EzyCalculator unit registry. See how calculations are reviewed and tested.