Kilograms to Milligrams converter

To convert kilograms to milligrams, enter the value in the first field. The result in milligrams is calculated automatically using the exact conversion factor.

1 kg = 1000000 mg
1 mg = 1 × 10^-6 kg

Formula: mg = kg × 1000000
kg = mg × 1 × 10^-6

Definitions: 1 mg = 0.001 g

The kilogram (kg) is the SI base unit of mass, defined since 2019 through the Planck constant. It is used for body weight, groceries and luggage in most countries.

The milligram (mg) is one thousandth of a gram. It is the standard unit for doses of medicines and supplements, and for nutrients such as sodium and caffeine on food labels.

See the conversion table with commonly used values, handy for quick reference or study.