⚖️ Weight Converter

Pounds to Kilograms
( lb → kg )

Instantly convert pounds to kilograms. Enter any value below and get an accurate result with the full formula and reference table.

Converter Tool
lb
kg
Result
1 lb = 0.45359237 kg
0.45359237
kg
The Formula
kg = lb × 0.45359237
1 pound = 0.45359237 kilograms exactly. Therefore, kilograms = pounds × 0.45359237.

How to Convert Pounds to Kilograms

To convert pounds to kilograms, multiply the number of pounds by 0.45359237. This is the exact conversion factor based on the international avoirdupois pound.

Step-by-Step Example

Let’s convert 2 pounds to kilograms:

1. Multiply by 0.45359237: 2 × 0.45359237 = 0.90718474
2. So 2 lb equals 0.90718474 kg.

For a smaller amount, 0.5 lb × 0.45359237 = 0.226796185 kg.

When You’d Use Each Unit

Pounds are commonly used in the US for measuring body weight, food, and everyday items. Kilograms are the standard unit of mass in the metric system, used worldwide in science, medicine, and commerce. Converting between them is essential for international travel, fitness tracking, and understanding product weights.

Conversion Table

Common pounds values converted to kilograms — typical values highlighted.

Pounds (lb) Kilograms (kg) Scientific Notation
Frequently Asked Questions
How do I convert pounds to kilograms quickly? +
Multiply the number of pounds by 0.45359237. For example, 3 lb × 0.45359237 = 1.36077711 kg. This tool provides the precise value.
How many kilograms are in a pound? +
There are exactly 0.45359237 kilograms in one pound (based on the international avoirdupois pound).
What is 1 lb in kilograms? +
1 lb = 0.45359237 kg.
What is 1 kilogram in pounds? +
1 kg ≈ 2.20462262 lb.
What is 0.1 lb in kilograms? +
0.1 lb = 0.045359237 kg.
Can I convert kilograms back to pounds with this tool? +
Yes! Just type a value into the kilograms field and the pounds field updates automatically. Or use the ⇄ swap button to switch directions.
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