Weight Converter

Convert weight and mass measurements between kilograms, grams, pounds, ounces, stones, metric tonnes, US short tons, and UK long tons with this free online tool.

Enter weight or mass Enter zero or a positive number.

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How to Use the Weight Converter

Enter the value you want to convert.
Select the original unit from the first dropdown.
Select the destination unit from the second dropdown.
Click Convert Weight to see the result.
Click Reset to clear the form and result.

You can use decimal values for measurements such as 2.5 kilograms or 12.75 ounces. The converter also supports zero.

Common Weight and Mass Conversions

1 kilogram = 1,000 grams

1 kilogram ≈ 2.20462262 pounds

1 pound = 16 ounces

1 stone = 14 pounds

1 metric tonne = 1,000 kilograms

1 US short ton = 2,000 pounds

1 UK long ton = 2,240 pounds

These units are not interchangeable in every context. A metric tonne is 1,000 kilograms, a US short ton is 2,000 pounds, and a UK long ton is 2,240 pounds. Choose the correct unit for your measurement.

Understanding Weight and Mass Units

Metric units

Kilograms, grams, milligrams, and metric tonnes belong to the metric system. A kilogram is commonly used for body mass and household items, while grams and milligrams are useful for smaller quantities.

Imperial and US customary units

Pounds and ounces are widely used in the United States and other regions. Stones are commonly used for body weight in the UK. US short tons and UK long tons are different units used for larger quantities.

How does the calculation work?

The converter first changes the entered value to kilograms using a standard conversion factor. It then divides that mass by the conversion factor for the destination unit. This allows the tool to convert between any two supported units.

Frequently Asked Questions

How many pounds are in one kilogram?

One kilogram is approximately 2.20462262 pounds.

How many ounces are in one pound?

One avoirdupois pound contains exactly 16 ounces.

How many kilograms are in a metric tonne?

One metric tonne equals exactly 1,000 kilograms.

What is the difference between a US ton and a UK ton?

A US short ton equals 2,000 pounds. A UK long ton equals 2,240 pounds. A metric tonne equals 1,000 kilograms.

Can I convert pounds to kilograms?

Yes. Enter the number of pounds, select Pounds as the original unit and Kilograms as the destination unit, then convert.

Is this Weight Converter free?

Yes. This tool is free to use in your browser without installing any software.