Unit Conversion

Weight Converter

Kilograms, grams, pounds, ounces, stones and US tons — converted instantly.

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Conversion standard

Conversions follow international standard definitions. Results keep up to 10 significant digits; very large or very small values switch to scientific notation.

Quick conversion

Result

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Results follow international unit definitions — round them as needed for everyday use. For engineering or trade, apply the precision agreed in the contract.
UnitConverted value

The table below converts your input into every unit; the source unit row is highlighted.

How to use

Getting accurate weight conversions

1

Metric scales by 1,000

Metric units step by 1,000: 1 kg = 1,000 g and 1 g = 1,000 mg, so switching units just moves the decimal point.

2

US units worth knowing

Pounds and ounces are the everyday US units: 1 lb = 16 oz = 453.59237 g, and 1 stone = 14 lb.

3

Always name your ton

A metric tonne is 1,000 kg, a US ton is 2,000 lb (907.185 kg) and a UK long ton is 2,240 lb — state which one in any contract.