Basic Measurements

Weight & Mass Converter

Mass measures the amount of matter; its base unit is the kilogram. The pound and ounce come from the imperial/US system, while a metric tonne is 1000 kilograms.

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KilogramPound KilogramGram KilogramMetric Tonne KilogramMilligram PoundOunce PoundGram Metric TonnePound StoneKilogram

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About this category: Weight & Mass

Mass measures the amount of matter; its base unit is the kilogram. The pound and ounce come from the imperial/US system, while a metric tonne is 1000 kilograms.

Mass is measured in kilograms; a metric tonne is 1000 kg, and the US short ton differs from the UK long ton.

Practical uses

Rebar and construction material weights
Trade, freight and shipping
Precise ingredients and recipes

Available units

Unit	Name	Definition	Classification
kg	Kilogram	The kilogram is the SI base unit of mass.	SI Base
g	Gram	One thousandth of a kilogram.	SI Derived
mg	Milligram	One thousandth of a gram.	SI Derived
µg	Microgram	One millionth of a gram.	SI Derived
t	Metric Tonne	The metric tonne is accepted for use with the SI, equal to 1000 kg.	Accepted with SI
lb	Pound	The avoirdupois pound, exactly 0.45359237 kilograms.	Non-SI
oz	Ounce	An ounce of 28.3495 grams.	Non-SI
ct	Carat	A carat of 0.2 grams, used for gemstones.	Non-SI
st	Stone	A British stone of 14 pounds.	Non-SI
US ton	Short Ton (US)	A US short ton of 2000 pounds.	Non-SI
UK ton	Long Ton (UK)	A UK long ton of 2240 pounds.	Non-SI
gr	Grain	A grain of 64.79891 milligrams.	Traditional