Converters
Weight Converter
Convert between kilograms, grams, milligrams, tonnes, pounds, ounces, stones and carats. The value is shown in every unit so you can read off whichever you need.
How to use this converter
- Enter the value you want to convert.
- Choose the source and target units.
- Use Swap to reverse the direction.
Formula
Result = Value × (factor of source unit) ÷ (factor of target unit)
- factor
- how many kilograms one unit represents
The pound is defined as exactly 0.45359237 kilograms, so all imperial mass conversions here are exact.
Worked example
Converting 70 kilograms to pounds.
- Factor1 lb = 0.45359237 kg
- Calculation70 ÷ 0.45359237
70 kg is about 154.32 pounds, or 11 stone 0.3 pounds.
Mass and weight
Strictly, kilograms measure mass and weight is a force. In everyday use the two words are interchangeable, and every unit here is a unit of mass, so conversions between them hold anywhere.
Units with specific uses
The stone is used for body weight mainly in the United Kingdom and Ireland, and equals 14 pounds. The carat is used for gemstones and is exactly 200 milligrams, which is different from the karat that measures gold purity.
A tonne, also called a metric ton, is 1,000 kilograms. It differs from the US short ton and the UK long ton, neither of which is included here to avoid ambiguity.
Things to keep in mind
- Carat here means the gemstone mass unit, not the karat used for gold purity.
- Tonne means the metric tonne of 1,000 kg.
Frequently asked questions
How many pounds is one kilogram?
One kilogram is about 2.2046 pounds. One pound is exactly 0.45359237 kilograms.
How many grams are in an ounce?
One ounce is exactly 28.349523125 grams.
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