Weight Converter
Convert between milligrams, grams, kilograms, metric tons, ounces, pounds, stones, and US tons.
How to Use
- Enter the weight or mass value you want to convert in the "Value" field.
- Select the unit of your input value from the dropdown menu (e.g., kilograms, pounds, ounces).
- Click "Convert" or simply change the input -- results update automatically as you type.
- View conversions to all other supported units displayed in the results grid below.
Frequently Asked Questions
What is the difference between a metric ton and a US ton?
A metric ton (also called a tonne) equals 1,000 kilograms or approximately 2,204.6 pounds. A US ton (also called a short ton) equals 2,000 pounds or approximately 907.2 kilograms. The metric ton is about 10% heavier than the US ton. There is also a long ton (imperial ton) of 2,240 pounds used in the UK, which this converter does not include.
How many pounds are in a stone?
One stone equals exactly 14 pounds, or approximately 6.35 kilograms. The stone is commonly used in the United Kingdom and Ireland for expressing body weight. For example, a person weighing 154 pounds would be described as weighing 11 stone.
Are the conversions exact?
The conversions use internationally recognized exact or standard values. For example, 1 pound = exactly 453.59237 grams, and 1 ounce = exactly 28.349523125 grams. Results are displayed to a high number of significant digits for precision, but very small rounding differences may occur at extreme values.
Can I convert very large or very small values?
Yes. The converter handles any numeric value, from fractions of a milligram to millions of tons. For very large or very small results, the numbers are displayed in a readable format. Simply enter any positive or negative number to see the conversion.