Convert Pounds to Kilograms
lb to kg · weight & mass conversion
What are pounds and kilograms?
A pound is an imperial unit of mass equal to 0.453592 kg, standard for body weight in the US. The kilogram is the SI base unit of mass, defined since 2019 by the Planck constant. For scale: a 70 kg adult weighs about 154 lb, and a bag of sugar is usually 1 kg (2.2 lb).
How to convert pounds to kilograms
1 lb = 0.453592 kg. To convert, multiply the number of pounds by 0.453592. For example, 5 lb = 2.26796 kg, and 20 lb = 9.07184 kg. To go the other way, multiply kilograms by 2.20462 (since 1 kg = 2.20462 lb).
Pounds to Kilograms conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.453592 |
| 2 | 0.907184 |
| 5 | 2.26796 |
| 10 | 4.53592 |
| 25 | 11.3398 |
| 50 | 22.6796 |
| 100 | 45.3592 |
FAQ
What is 1 lb in kg?
1 lb = 0.453592 kg. To convert any amount, multiply the number of pounds by 0.453592.
How do I convert kilograms back to pounds?
Go the other way: 1 kg = 2.20462 lb, so multiply kilograms by 2.20462 to get pounds.
Is a pound bigger than a kilogram?
No — 1 lb is the smaller unit, equal to 0.453592 kg (it takes 2.20462 lb to make one kg).
Are these weight & mass conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.