LB to KG

What is a pound?

The pound (lb) is a unit of mass used mainly in the United States, the United Kingdom, and a few other countries. The international avoirdupois pound is defined as exactly 0.45359237 kilograms. The abbreviation "lb" derives from the Latin "libra," and the symbol "lb" is used in both the US customary and British imperial systems.

In everyday American life, pounds are the standard unit for body weight, food packaging, and many commercial products. The UK officially uses metric units but still commonly uses pounds for personal weight.

What is a kilogram?

The kilogram (kg) is the SI base unit of mass, used worldwide for everything from grocery shopping to scientific research. Since 2019, it is defined by the Planck constant, making it the most precisely defined unit in the SI system. One kilogram equals approximately 2.20462 pounds.

The kilogram is the standard mass unit in nearly every country. It provides a consistent, universally understood measurement that simplifies international trade, science, and communication.

When to convert lb to kg

Common scenarios include:

• International travel. Baggage allowances are often quoted in kilograms.
• Medical records. Many countries use kilograms for patient weight.
• Fitness tracking. Converting between scales for global fitness apps.
• Product specifications. International product labels list metric weights.

How to convert lb to kg

This tool converts instantly in your browser.

1. Enter a value. Type a weight in pounds in the input box.
2. See the result. The kilogram equivalent appears immediately.
3. Copy if needed. Click "Copy result" to copy the value.

The formula is kg = lb ÷ 2.20462. For example, 150 lb = 150 ÷ 2.20462 = 68.0389 kg. All math is local and private.

Common lb to kg values

Frequently used weight conversions:

Pounds	Kilograms	Description
1 lb	0.45 kg	Small item
10 lb	4.54 kg	Bag of flour
50 lb	22.68 kg	Child
100 lb	45.36 kg	Light adult
150 lb	68.04 kg	Average adult
200 lb	90.72 kg	Heavy adult