Milligrams to Kilograms converter

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

1 mg = 1 × 10^-6 kg
1 kg = 1000000 mg

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

Definitions: 1 mg = 0.001 g

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.

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.

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