How do I convert Milligram (mg) to Kilogram (kg)?

1 mg equals 1E-06 kg using SI-based conversion and precise factors.

What is the formula to convert Milligram (mg) to Kilogram (kg)?

This is a linear unit conversion using a constant factor between units.

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

Use the shareable URL pattern: /convert/mg-to-kg/1

Category: Mass

Value From To Precision

1E-06 kg

1 mg = 1E-06 kg

High-precision rounding: 6 decimals

We convert by pivoting through the SI base unit for Mass and applying exact factors where applicable.

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Mass quantifies matter. The SI kilogram is defined via fundamental constants.

Milligram (mg)

1/1,000,000 of a kilogram; micro-dosing, lab work.

History: Used widely with precision balances.

Kilogram (kg)

SI base unit of mass defined via Planck’s constant.

History: Since 2019 defined through h; before that, by the IPK artifact.