Weight Converter

Mass vs. Weight

While often used interchangeably in everyday life, mass and weight are scientifically different. Mass refers to the amount of matter in an object, which remains constant regardless of location. Weight is the force exerted on that mass by gravity.

Global Standards

The kilogram (kg) is the base unit of mass in the International System of Units (SI). Historically, it was defined by a physical platinum-iridium cylinder stored in France, known as the International Prototype of the Kilogram (IPK). In 2019, it was redefined based on fundamental physical constants, specifically the Planck constant.

Common Weight Conversions

• 1 Ounce (oz) = 28.3495 Grams (g)
• 1 Pound (lb) = 16 Ounces = 0.453592 Kilograms (kg)
• 1 Stone (st) = 14 Pounds = 6.35029 Kilograms (kg)
• 1 Kilogram (kg) = 1,000 Grams = 2.20462 Pounds (lbs)

How Our Tool Works

The Weight Converter provides real-time, bi-directional conversion. As soon as you type a number in the "From" input, the result instantly appears in the "To" field. You can easily reverse the conversion direction by clicking the Swap icon in the center. We also automatically generate a quick reference table based on your selected units to help you memorize common conversions.