Pounds to Kilograms (lbs to kg) Converter
Also try: KG to LBS
About Pounds to Kilograms Conversion
The pound (lb) is the primary unit of mass used in the United States and several other countries following the imperial or US customary system. One pound is defined as exactly 0.45359237 kilograms.
Formula
Common Reference Values
| Pounds (lbs) | Kilograms (kg) | Context |
|---|---|---|
| 1 lb | 0.454 kg | A small carton of butter |
| 10 lb | 4.536 kg | A small bowling ball |
| 100 lb | 45.359 kg | Light person / large bag |
| 150 lb | 68.039 kg | Average adult (female) |
| 180 lb | 81.647 kg | Average adult male |
| 200 lb | 90.718 kg | Heavy adult / large load |
Related Weight Converters
Converting Pounds to Kilograms Accurately
The pound (lb) is defined in the international yard and pound agreement of 1959 as exactly 0.45359237 kilograms. To convert pounds to kilograms, multiply by 0.45359237 or divide by 2.20462. The conversion is essential in medicine, where dosing calculations are based on body weight in kilograms for drugs including anesthetics, chemotherapy agents, and pediatric medications. Aviation fuel is commonly measured in pounds in the US but in kilograms on international weight-and-balance sheets. Laboratory balances calibrated in grams and kilograms require conversion of ingredient quantities from recipes written in ounces and pounds. Bodyweight exercises and powerlifting competitions quote totals in kilograms internationally, while US-based athletes often work in pounds, requiring conversion for international meet records. Food packaging in the US lists net weight in pounds but must also state grams or kilograms under international trade regulations, making the conversion factor a practical everyday tool.
Pounds to Kilograms Reference Table
| Pounds (lb) | Kilograms (kg) | Context |
|---|---|---|
| 1 | 0.454 | Small package |
| 10 | 4.536 | Bowling ball |
| 100 | 45.36 | Barbell plates set |
| 150 | 68.04 | Average adult (lighter) |
| 200 | 90.72 | Average adult (heavier) |
