Pounds to Kilograms Converter
Convert pounds to kilograms instantly. Exact formula, quick chart and examples. Free, no signup.
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About the Pounds to Kilograms Converter
This free pounds to kilograms converter gives the exact result as you type, with no button to press and no signup. It is built for everyday use in the US: recipes, travel, fitness, weather, school work and shopping. The formula and a quick reference chart are included below so you can check the math yourself.
Need the opposite direction? Use the Kilograms to Pounds converter.
How to use it
- Type the number of pounds in the first box.
- Read the result in kilograms immediately below.
- Use the chart on this page for common values you can check at a glance.
Pounds to Kilograms formula
kg = lbs × 0.45359237
Example: 150 lb × conversion = 68.039 kg.
Quick mental estimate: halve the pounds and subtract 10 % of that. 200 lbs is about 100 − 10 = 90 kg (exact: 90.7 kg).
lb to kg chart
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.454 kg |
| 5 lb | 2.268 kg |
| 10 lb | 4.536 kg |
| 25 lb | 11.34 kg |
| 50 lb | 22.68 kg |
| 100 lb | 45.359 kg |
| 120 lb | 54.431 kg |
| 150 lb | 68.039 kg |
| 180 lb | 81.647 kg |
| 200 lb | 90.718 kg |
| 250 lb | 113.398 kg |
kg to lb reverse chart
Going the other way? These are the same values read backwards.
| Kilograms (kg) | Pounds (lb) |
|---|---|
| 0.454 kg | 1 lb |
| 2.268 kg | 5 lb |
| 4.536 kg | 10 lb |
| 11.34 kg | 25 lb |
| 22.68 kg | 50 lb |
| 45.359 kg | 100 lb |
| 54.431 kg | 120 lb |
| 68.039 kg | 150 lb |
| 81.647 kg | 180 lb |
| 90.718 kg | 200 lb |
| 113.398 kg | 250 lb |
About pounds and kilograms
The avoirdupois pound is defined as exactly 0.45359237 kilograms. Pounds are used for body weight, luggage and groceries in the US, while kilograms are used almost everywhere else and in medicine and science.
Common uses
- Body weight and fitness goals when using metric tools or international guidelines.
- Airline baggage limits (for example 50 lb is 22.7 kg).
- Medication dosing that is based on kg of body weight.
Frequently asked questions
How many kg is 150 pounds?
150 lbs is 68.04 kg.
How many kg is 200 pounds?
200 lbs is 90.72 kg.
How many kg is 1 pound?
1 lb is exactly 0.45359237 kg.
How many kg is 100 pounds?
100 lbs is 45.36 kg.
What is the formula to convert pounds to kilograms?
kg = lbs × 0.45359237. This page applies it for you instantly as you type.
Last reviewed: November 2026.
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