Unit Converter Express Version🧮
Pounds to Kilograms
1 pound = 0.453592 kilograms
To convert pounds to kilograms, use the formula kilograms = pounds × 0.45359237. Type any value in the converter above for an instant result — everything runs in your browser.
About these units
The pound is the everyday unit of weight in the United States, while the kilogram is the metric standard used by science, medicine and most countries. Converting pounds to kilograms is essential for international travel, medical dosing, shipping and fitness tracking.
When you might need this conversion
- Converting a 150 lb body weight to kilograms for a medical form abroad
- Working out whether a 50 lb suitcase is under a 23 kg airline limit
- Converting a recipe's 2 lb of flour into kilograms for metric kitchen scales
Pounds to Kilograms conversion table
| pounds (lb) | kilograms (kg) |
|---|---|
| 1 lb | 0.453592 kg |
| 2 lb | 0.907185 kg |
| 5 lb | 2.268 kg |
| 10 lb | 4.5359 kg |
| 20 lb | 9.0718 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
| 120 lb | 54.4311 kg |
| 150 lb | 68.0389 kg |
| 180 lb | 81.6466 kg |
| 200 lb | 90.7185 kg |
| 250 lb | 113.3981 kg |
How to convert pounds to kilograms
- Enter your value in the “From” box above.
- The result in kilograms appears instantly, using kilograms = pounds × 0.45359237.
- Swap the units any time to convert back.
Frequently asked questions
How many kilograms is 1 pound?
1 pound is exactly 0.45359237 kilograms, or roughly 0.45 kg.
What is 100 lbs in kg?
100 pounds is about 45.36 kilograms (100 × 0.45359237).
How do I quickly estimate pounds to kilograms?
Halve the pounds, then subtract about 10% of that. For 180 lb: half is 90, minus 9 gives about 81 kg — very close to the exact 81.65 kg.
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