Weight Converter

Convert between different weight units - kilograms, pounds, grams, ounces, and more

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What Is Weight Conversion?

Weight (or mass) is a measure of the amount of matter in an object. Because different countries and industries use different systems of measurement (Metric vs. Imperial), converting weight from one unit to another is a common daily task.

Whether you are following a recipe from another country, calculating shipping costs, or monitoring your health, a weight converter makes it easy to understand the numbers.

Common Units of Weight

Kilogram (kg): The SI base unit of mass. It is widely used in science, engineering, and daily life in most countries.
Gram (g): A metric unit equal to one-thousandth of a kilogram. Commonly used for small items like food ingredients.
Pound (lb): An imperial unit of mass used primarily in the United States and the United Kingdom for body weight and groceries.
Ounce (oz): A smaller imperial unit. There are 16 ounces in a pound.
Metric Ton (t): Equal to 1,000 kilograms. Used for heavy loads and industrial purposes.

How to Convert Weight Units?

Our converter handles the math automatically, but here are some common conversion factors for reference:

From kg to lb: Multiply by 2.20462
From lb to kg: Multiply by 0.453592
From g to oz: Multiply by 0.035274
From oz to g: Multiply by 28.3495

Frequently Asked Questions (FAQs)

What is the difference between Weight and Mass?

In physics, mass is the amount of matter in an object and remains constant everywhere. Weight is the force exerted on that mass by gravity and can change depending on where you are (e.g., you would weigh less on the Moon). In daily life, however, the terms are used interchangeably.

How many grams are in a pound?

There are approximately 453.592 grams in one pound.

Why does the US still use pounds instead of kilograms?

The US uses the US Customary System, which is derived from the British Imperial System. While the rest of the world (including the UK mostly) transitioned to the Metric system for simplicity, the US has retained its traditional units for most daily applications due to the high cost and complexity of switching infrastructure.