Pounds to Kilograms converter (lb to kg)
Convert Pounds (lb) to Kilograms (kg) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Pounds to Kilograms
1 pound (lb) is equal to 0.45359237 kilograms (kg).
1 lb = 0.45359237 kg
The mass m in kilograms (kg) is equal to the mass m in pounds (lb) multiplied by 0.45359237:
Example: Convert 5 lb to kilograms:
m(kg) = 5 lb × 0.45359237 = 2.268 kg
What is a Pounds?
The pound (lb) is a unit of mass in the imperial and US customary systems. One international pound is defined as exactly 0.45359237 kilograms.
What is a Kilograms?
The kilogram (kg) is the SI base unit of mass. It is the standard used in science and in most countries for body weight, food, and shipping.
This page converts mass from Pounds into Kilograms. One lb equals 0.45359237 kg.
Pounds to Kilograms conversion table
Common lb values and the matching kg result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 0 lb | 0 kg |
| 0.1 lb | 0.045359237 kg |
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 3 lb | 1.36077711 kg |
| 4 lb | 1.81436948 kg |
| 5 lb | 2.26796185 kg |
| 6 lb | 2.72155422 kg |
| 7 lb | 3.17514659 kg |
| 8 lb | 3.62873896 kg |
| 9 lb | 4.08233133 kg |
| 10 lb | 4.5359237 kg |
| 20 lb | 9.0718474 kg |
| 30 lb | 13.6077711 kg |
| 40 lb | 18.1436948 kg |
| 50 lb | 22.6796185 kg |
| 60 lb | 27.2155422 kg |
| 70 lb | 31.7514659 kg |
| 80 lb | 36.2873896 kg |
| 90 lb | 40.8233133 kg |
| 100 lb | 45.359237 kg |
| 1000 lb | 453.59237 kg |
How this calculator works
The form on this page is a Pounds-to-Kilograms converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the kg result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many kg are in 1 lb?
1 lb = 0.45359237 kg.
How do I convert Pounds to Kilograms?
The mass m in kilograms (kg) is equal to the mass m in pounds (lb) multiplied by 0.45359237:
Is this lb to kg converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.