Volume Conversion
Work out different volume measurements with this calculator, currently 17 volumes that can be converted.
Mass Converter
This free online mass conversion tool makes it easy to convert a mass measurement into a wide range of commonly used metric and imperial units. Whether you’re working with scientific measurements, cooking ingredients, shipping weights, or industrial loads, this calculator delivers fast and accurate conversions.
With this mass calculator, you can convert between Micrograms, Milligrams, Grams, Kilograms, Metric Tons, Ounces, Pounds, Stones, Short Tons, and Long Tons. Simply enter a value into any of the input fields, and the calculator will instantly calculate and display the equivalent values across all other mass units. This allows you to compare measurements used across different countries and industries without manual calculations.
Enter mass / weight
mcg
oz
mg
lb
g
st
kg
US ton
t
UK ton
Calculated in your browser as you type. Very small results can show as 0 when rounded to few decimal places.
How to use it
The mass conversion calculator is a handy webtool to use to convert from one mass to another.
- Enter a valueType a mass or weight into any one of the fields. Any number is accepted, including the ‘e’ exponent such as 5e-3.
- Read the resultsAll the other fields update automatically with the converted values.
- Copy a valueClick the clipboard button beside any field to copy it.
- Tidy the numbersUse Decimal places to round the results, or leave it on full precision.
Handy conversions
1 kilogram
Is about 2.2046 pounds, or 35.274 ounces.
1 pound
Is exactly 0.45359237 kilograms, or 16 ounces.
1 stone
Is 14 pounds, or about 6.35 kilograms.
Mass unit comparison table
| Unit name | Symbol | Description | Equals in kilograms |
|---|---|---|---|
| Microgram | µg | Very small metric unit used in science and medicine | 0.000000001 kg |
| Milligram | mg | Used for small quantities and precision measurements | 0.000001 kg |
| Gram | g | Standard metric unit for everyday weights | 0.001 kg |
| Kilogram | kg | Base unit of mass in the metric system | 1 kg |
| Metric Ton | t | Used for large metric weights | 1,000 kg |
| Ounce | oz | Small imperial unit commonly used in cooking | 0.0283495 kg |
| Pound | lb | Common imperial unit for body and package weight | 0.453592 kg |
| Stone | st | Imperial unit mainly used in the UK | 6.35029 kg |
| Short Ton | ton (US) | Used in the United States | 907.185 kg |
| Long Ton | ton (UK) | Imperial ton used in the UK | 1,016.05 kg |
Helpful notes
Metric scales by ten
Metric units scale by factors of 10, making conversions straightforward. Micrograms and milligrams are commonly used in laboratory and medical contexts.
Imperial varies
Imperial units vary by region and use case.
Three kinds of ton
Short tons and long tons are not the same as a metric ton, so check which one you need.
Frequently asked questions
How many pounds are in a kilogram?
One kilogram is about 2.2046 pounds. To convert kilograms to pounds multiply by 2.2046, and to convert pounds to kilograms multiply by 0.4536.
How many pounds are in a stone?
One stone is exactly 14 pounds. Stones are used for body weight in the UK and Ireland.
What is the difference between a short ton, a long ton and a metric ton?
A short ton (US) is 2,000 pounds, about 907 kg. A long ton (UK) is 2,240 pounds, about 1,016 kg. A metric ton, or tonne, is 1,000 kg. They are close but not equal.
Is this mass or weight?
Strictly, mass is how much matter an object has and weight is the force of gravity on it. In everyday use, and on Earth, the two are used interchangeably, and this tool converts between units of mass.
Can I type very large or very small numbers?
Yes. Any number is accepted, including scientific notation such as 1e9 or 5e-3.
Is anything sent to a server?
No. The conversion is calculated in your browser as you type.
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