⚖ Weight Converter

Convert between kilograms, pounds, ounces, grams, tonnes, stones, and more weight units instantly and accurately.

Convert Weight / Mass Units

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About Weight and Mass Conversion

Weight and mass measurement units vary significantly between the metric and imperial measurement systems. While most of the world uses kilograms and grams, the United States still primarily uses pounds and ounces for everyday weight measurement. Our weight converter makes it easy to switch between these and many other units.

In science, "mass" and "weight" have different meanings — mass is the amount of matter in an object, while weight is the force gravity exerts on that mass. However, for everyday purposes, these terms are used interchangeably, and our converter handles all common weight and mass units.

Common Weight Conversions

How to Use the Weight Converter

Simply enter the weight value you want to convert, select your source unit from the dropdown, and instantly see the equivalent values in all supported units. The converter automatically updates as you type, making it quick and easy to get the results you need.