Pound to KilogramConverter
Instantly convert Pound (lb) to Kilogram (kg). Free, accurate, and easy to use.
How to Convert Pound to Kilogram
To convert Pound (lb) to Kilogram (kg), multiply your value by 0.453592.
Example: 5 lb × 0.453592 = 2.26796 kg
What is a Pound?
The pound is the primary unit of mass in the US customary and imperial systems, equal to 16 avoirdupois ounces or exactly 0.45359237 kilograms. Its name derives from the Latin 'libra pondo' (a pound weight), and its symbol 'lb' comes from 'libra.' Body weight in the United States and parts of the UK are commonly expressed in pounds and ounces. One pound of butter is the standard package size in American grocery stores.
What is a Kilogram?
The kilogram is the SI base unit of mass, redefined in 2019 by fixing the Planck constant to an exact numerical value of 6.62607015 × 10⁻³⁴ J·s — replacing the century-old physical platinum-iridium artifact. It is used worldwide for body weight, commercial goods, and scientific measurements. One kilogram equals exactly 2.20462 pounds. The kilogram is also the only SI base unit whose name includes a prefix.
Pound to Kilogram Conversion Table
| Pound (lb) | Kilogram (kg) |
|---|---|
| 0.001 lb | 0.00045359 kg |
| 0.01 lb | 0.00453592 kg |
| 0.1 lb | 0.0453592 kg |
| 0.5 lb | 0.226796 kg |
| 1 lb | 0.453592 kg |
| 2 lb | 0.907184 kg |
| 5 lb | 2.26796 kg |
| 10 lb | 4.53592 kg |
| 20 lb | 9.07184 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
| 200 lb | 90.7184 kg |
| 500 lb | 226.796 kg |
| 1000 lb | 453.592 kg |
| 5000 lb | 2267.96 kg |
| 10000 lb | 4535.92 kg |
| 50000 lb | 22679.6 kg |
| 100000 lb | 45359.2 kg |
| 1000000 lb | 453592 kg |
| 1000000000 lb | 453592000 kg |
Frequently Asked Questions
How do I convert Pound to Kilogram?
Multiply the Pound value by 0.453592. Formula: kg = lb × 0.453592. Example: 10 lb = 4.53592 kg.
How many Kilogram are in one Pound?
One Pound (lb) equals 0.453592 Kilogram (kg).
How many Pound are in one Kilogram?
One Kilogram (kg) equals 2.20462442 Pound (lb).
What is the exact conversion factor from Pound to Kilogram?
The conversion factor is 0.453592. Multiply any lb value by this number to get kg. For the reverse, multiply by 2.20462442.
How do I convert Kilogram back to Pound?
Divide by 0.453592, or equivalently multiply by 2.20462442. Formula: lb = kg ÷ 0.453592.
Is the Pound-to-Kilogram conversion internationally standardized?
Yes. Both units are defined by international standards (SI or the international yard/pound agreement), so the conversion factor 0.453592 is exact and universally agreed upon.