Convert lbs to kg — Free Pounds to Kilograms Calculator
Convert pounds to kilograms instantly. Enter any value and get the exact conversion with the formula displayed. Accurate to 4 decimal places.
Last updated: January 2026
Pounds to Kilograms Converter
The pounds to kilograms conversion formula
To convert pounds to kilograms, multiply by 0.453592. The formula is:
For example: 10 lbs = 4.5359 kg. This formula works for any value you enter in the calculator above.
Common lbs to kg conversions
| Pounds (lbs) | Kilograms (kg) |
|---|---|
| 1 | 0.4536 |
| 5 | 2.268 |
| 10 | 4.5359 |
| 20 | 9.0718 |
| 50 | 22.6796 |
| 100 | 45.3592 |
| 120 | 54.431 |
| 150 | 68.0388 |
| 200 | 90.7184 |
Use the converter above to calculate any custom value. The result updates instantly as you type.
Why both pounds and kilograms are used
The metric system (kilograms, grams) is the standard for most of the world, used in science, medicine, and everyday commerce. The imperial system (pounds, ounces) remains in use in the United States and, to a lesser extent, the United Kingdom. This dual-system world means that recipes, package labels, gym weights, and shipping measurements may use either system depending on the country. A reliable converter helps bridge the gap when dealing with international measurements.
How to use this converter
Simply type a value in either field — the converter instantly calculates the equivalent in the other unit. The conversion formula is shown below the inputs so you can see exactly how the result was calculated. Use the conversion table for quick reference of common values.
Need more conversions? Try the full unit converter which supports length, weight, temperature, volume, speed, area, energy, and pressure conversions all in one page.
Frequently asked questions about lbs to kg conversion
How do I convert pounds to kilograms?
To convert pounds to kilograms, multiply by 0.453592. For example, 1 lbs × 0.453592 = 0.4536 kg.
What is the formula to convert pounds to kilograms?
The formula to convert pounds to kilograms is: kilograms = pounds × 0.453592. Simply multiply the number of pounds by 0.453592 to get the equivalent in kilograms.
What is the difference between pounds and kilograms?
Pounds and kilograms are both units of weight or mass used in different measurement systems. Pounds are part of the metric system (used by most countries), while kilograms are part of the imperial system (primarily used in the US and UK).
Common lbs to kg conversions
Common conversions include: 1 lbs = 0.45 kg, 5 lbs = 2.27 kg, 10 lbs = 4.54 kg, 20 lbs = 9.07 kg, 50 lbs = 22.68 kg, 100 lbs = 45.36 kg, 120 lbs = 54.43 kg, 150 lbs = 68.04 kg. Use the calculator above for any value.