While often used interchangeably in everyday conversation, Mass is a fundamental measure of the amount of matter in an object, whereas Weight is the force exerted on an object due to gravity. Our powerful converter helps you effortlessly switch between various units of mass, such as Kilograms (kg), Pounds (lb), Grams (g), Ounces (oz), Metric Tons, Stones, and even Carats, for all your needs!
In physics, Mass is a fundamental property of an object, representing the amount of matter it contains. It remains constant regardless of location or gravity. Weight, on the other hand, is the force of gravity acting on an object's mass, meaning it can change depending on the gravitational field (e.g., your weight would be different on the Moon, but your mass would remain the same).
However, in everyday language, "weight" is commonly used to refer to mass. Our online Weight & Mass Converter is a practical tool designed to facilitate conversions between various units of mass. This is crucial whether you're dealing with groceries, personal fitness, shipping cargo, or conducting precise scientific measurements across different measurement systems (e.g., metric vs. imperial).
Our converter supports a comprehensive range of mass units, catering to all your needs:
The SI base unit of mass. Widely used globally for most measurements.
A unit of mass in the imperial system, common in the United States and occasionally the UK. 1 lb ≈ 0.4536 kg.
One-thousandth of a kilogram. Used for smaller measurements like food ingredients.
A smaller imperial unit. 1 oz = 1/16 lb. Used in cooking and small item weighing.
Also known as a "tonne." Equal to 1,000 kilograms. Used for very large masses, e.g., in shipping.
An imperial unit primarily used in the UK and Ireland for measuring body weight. 1 st = 14 lbs.
Other specialized units include **Milligram (mg)** and **Microgram (µg)** for very small quantities (e.g., pharmaceuticals), **Carat (ct)** for gemstones (1 ct = 200 mg), **Short Ton (US ton)** and **Long Ton (Imperial ton)** for large cargo, particularly in the US and UK respectively.
Achieve precision and convenience in all your mass conversions:
Convert across all major metric and imperial mass units, from tiny micrograms to massive tons.
Uses exact and standard definitions for reliable and precise results every time.
Conversions happen in real-time as you type or change units, saving you time and effort.
A simple and intuitive interface ensures a smooth conversion experience for everyone.
Access this valuable tool anytime, anywhere, on any device, completely free of charge.
Ideal for fitness tracking, cooking, logistics, scientific research, and international trade.
Converting weight and mass units is simple with our online tool:
Input the numerical value of the weight or mass you wish to convert into the input field.
Choose the original unit of your measurement from the "From Unit" dropdown menu (e.g., "Pound," "Gram").
Select the desired target unit for your conversion from the "To Unit" dropdown menu.
The converted mass value will instantly appear in the "Result" display box.
All mass units can be related back to the Kilogram (kg), the SI base unit:
Our converter applies these precise formulas automatically, ensuring correct conversions every time.
Mass is a fundamental measure of the amount of matter in an object and is constant everywhere. Weight is the force of gravity on that mass and changes with the gravitational field (e.g., on the Moon vs. Earth). Our converter primarily deals with units of mass, which are commonly referred to as "weight" in everyday language.
The main types are the Metric Ton (tonne), which is 1,000 kg and used internationally; the Short Ton (US ton), which is 2,000 pounds and used in the United States; and the Long Ton (Imperial ton), which is 2,240 pounds and historically used in the UK. Our converter includes all three for comprehensive conversion.
While most commonly associated with diamonds and other gemstones, the carat (ct) is a unit of mass specifically used for measuring precious stones and pearls, defined as exactly 200 milligrams (0.2 grams).
Yes, our Weight & Mass Converter features a responsive design, ensuring optimal performance and ease of use on smartphones, tablets, and desktop computers.
Many of the conversion factors between metric and imperial units (like pounds to kilograms) are now defined exactly. Our tool uses these precise definitions, providing results with a high degree of numerical accuracy (typically 6-8 decimal places), which is more than sufficient for virtually all practical and scientific applications.
Easily find our versatile Weight & Mass Converter using these popular search queries: