Weight and Mass Conversions
6 units · 30 converters
Convert between kilograms, grams, milligrams, metric tons, pounds and ounces. Exact internationally agreed factors for cooking, fitness, shipping and science.
Milligram(mg)
A milligram is one thousandth of a gram, used for medication doses, vitamins and chemical additives. Precision at this scale matters in pharmacology and nutrition labeling.
Gram(g)
The gram is the metric unit for everyday small masses, defined as one thousandth of a kilogram. Recipes, nutrition labels and postage are commonly specified in grams.
Kilogram(kg)
The kilogram is the SI base unit of mass, defined by fixing Planck's constant since 2019. It is the everyday standard for body weight, groceries and cargo worldwide.
Metric Ton(t)
A metric ton (tonne) equals 1,000 kilograms, the standard large-mass unit in the metric system. Freight, vehicles and industrial output are measured in tonnes.
Ounce(oz)
The avoirdupois ounce is a US customary unit defined as exactly 28.349523125 grams, or 1/16 of a pound. Food portions and packaged goods in the US are labeled in ounces.
Pound(lb)
The avoirdupois pound is defined as exactly 0.45359237 kilograms, or 16 ounces. It is the everyday unit of body weight and produce in the United States.