Weight & Mass Converter
Convert weight and mass — milligrams, grams, kilograms, tonnes, ounces, pounds, stones and tons.
What Is the Weight & Mass Converter?
The Weight & Mass Converter converts between micrograms, milligrams, grams, kilograms and metric tonnes, plus ounces, pounds, stones, US (short) tons, Imperial (long) tons and carats. Enter a value and read it in every unit. It runs entirely in your browser.
How It Works
Enter a value, pick the unit it's in and the unit you want, and the result updates instantly. The table below shows your value in all units, and the swap button reverses the pair.
When to Use It
Use it for cooking and recipes, shipping and parcel weights, body weight (kg ↔ lbs ↔ stones), gym plates, or science classes.
Frequently Asked Questions
- What's the difference between US tons and Imperial tons?
- A US ton (short ton) is 2,000 lb (≈907 kg); an Imperial ton (long ton) is 2,240 lb (≈1,016 kg). A metric tonne is 1,000 kg. All three are included.
- Is weight the same as mass?
- Strictly, mass (kg, g) and weight (a force) differ, but in everyday use these units are interchangeable, which is how this tool treats them.
Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.