Pounds to Kilograms Converter
Multiply the weight by 0.4536
Need the reverse? Kilograms to Pounds Converter
Pounds to Kilograms Conversion Table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.45 |
| 5 | 2.27 |
| 10 | 4.54 |
| 25 | 11.34 |
| 50 | 22.68 |
| 100 | 45.36 |
| 150 | 68.04 |
| 200 | 90.72 |
How to Convert Pounds to Kilograms
Multiply the weight by 0.4536.
One pound is defined as exactly 0.45359237 kilograms by international agreement.
When You Need This Conversion
Used when filling out international medical or fitness forms that require weight in kilograms, comparing products sold by the pound to metric package sizes, or calculating shipping costs for carriers that charge per kilogram.
Quick Conversion Tip
Divide by 2.2 for a quick estimate. This is accurate to within 0.2% — good enough for everyday use.
Common Pounds to Kilograms Conversions
- Average newborn weight (in lbs):10 lb = 4.54 kg
- Average 8-year-old child:50 lb = 22.68 kg
- Average adult (lighter):150 lb = 68.04 kg
- Average adult male (US):180 lb = 81.65 kg
- One kilogram expressed in pounds:2.21 lb = 1 kg
Popular Pounds to Kilograms Lookups
Frequently Asked Questions
- One pound equals approximately 0.4536 kilograms.
- Divide by 2.2 for a quick estimate. 100 lbs / 2.2 = about 45.5 kg (actual: 45.36 kg).
- 150 pounds equals approximately 68.04 kilograms.
- 180 pounds equals approximately 81.65 kilograms.
- 200 pounds equals approximately 90.72 kilograms.
- The conversion is exact: 1 lb = 0.45359237 kg by international definition. Rounding to 0.4536 introduces an error of less than 0.01%.
- Divide your weight in pounds by 2.2046. For example, 165 lbs ÷ 2.2046 = 74.84 kg.
Disclaimer
These tools provide estimates for informational purposes only. Results should not be used as the sole basis for financial, business, or legal decisions. Always consult qualified professionals for advice specific to your situation.