Pounds to Kilograms Converter
1 lb equals 0.45359237 kg, and 1 kg equals 2.2046226 lb. Enter a value in either box to convert pounds to kilograms and back. Formula: kilograms = value x unit factor (1 lb = 0.45359237 kg exactly, 1 oz = 1/16 lb, 1 st = 14 lb).
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1 lb = 0.45359237 kg
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
Pounds to Kilograms Conversion Table
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 5 lb | 2.2679619 kg |
| 10 lb | 4.5359237 kg |
| 25 lb | 11.339809 kg |
| 50 lb | 22.679619 kg |
| 75 lb | 34.019428 kg |
| 100 lb | 45.359237 kg |
| 200 lb | 90.718474 kg |
Kilograms to Pounds Conversion Table
| Kilograms | Pounds |
|---|---|
| 1 kg | 2.2046226 lb |
| 2 kg | 4.4092452 lb |
| 5 kg | 11.023113 lb |
| 10 kg | 22.046226 lb |
| 25 kg | 55.115566 lb |
| 50 kg | 110.23113 lb |
| 75 kg | 165.3467 lb |
| 100 kg | 220.46226 lb |
| 200 kg | 440.92452 lb |
Worked example: 10 lb = 4.5359237 kg. A 70 kg person weighs 70 x 2.20462 = 154.32 lb, which is 11 stone and 0.3 lb. A 500 g bag of flour is 17.64 oz.
Need other units? Open the full Weight and Mass Converter.
Popular Weight Conversions
Formula
kilograms = value x unit factor (1 lb = 0.45359237 kg exactly, 1 oz = 1/16 lb, 1 st = 14 lb)Understanding Weight Conversion
Mass is measured in kilograms in the metric system, while the United States uses pounds and ounces and the UK often uses stones for body weight. The avoirdupois pound has been defined as exactly 0.45359237 kilograms since 1959, so conversions are exact. Strictly, weight is a force and mass is an amount of matter, but in everyday use both words mean the same thing on a scale at the surface of the Earth.
Tips and Best Practices
- 1To convert kilograms to pounds, multiply by 2.20462; to convert pounds to kilograms, multiply by 0.45359.
- 2A stone is 14 pounds, so body weight in stones and pounds needs a division by 14 and a remainder.
- 3Jewelry uses carats (200 mg) for gemstones; do not confuse them with karats, which measure gold purity.
Real-World Example
A 70 kg person weighs 70 x 2.20462 = 154.32 lb, which is 11 stone and 0.3 lb. A 500 g bag of flour is 17.64 oz.
Common Mistakes to Avoid
- Confusing the short ton (2,000 lb, US) with the long ton (2,240 lb, UK) and the metric tonne (1,000 kg).
- Using troy ounces for gold with the regular avoirdupois ounce factor; troy ounces are heavier.
- Reading a stone value like 11.5 st as 11 st 5 lb; it is 11 st 7 lb.
How to Use
- Type a number in the Pounds box.
- The Kilograms result appears instantly; you can also edit the Kilograms box to convert backwards.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many kilograms are in 1 lb?
How many pounds are in 1 kg?
What is the formula to convert pounds to kilograms?
How many ounces are in a pound?
Sources: NIST Handbook 44 Appendix B (avoirdupois pound, ton, grain); BIPM SI Brochure (tonne, carat 200 mg).