Enter the amount of substance in milligrams and the mass in kilograms into the calculator to determine the concentration in milligrams per kilogram (mg/kg).

Mg Per Kg Formula

The following formula is used to calculate the concentration in milligrams per kilogram.

C = mg / kg

Variables:

  • C is the concentration (mg/kg)
  • mg is the amount of substance in milligrams
  • kg is the mass in kilograms

To calculate the concentration in mg/kg, divide the amount of substance in milligrams by the mass in kilograms.

What is Mg Per Kg?

Mg per kg is a unit of concentration often used in chemistry, medicine, and various scientific fields to express the amount of a substance in a specific mass of material. It is particularly useful for describing small quantities of a substance within a larger mass and is equivalent to parts per million (ppm) by mass.

How to Calculate Mg Per Kg?

The following steps outline how to calculate the concentration in milligrams per kilogram.


  1. First, determine the amount of substance in milligrams (mg).
  2. Next, determine the mass in kilograms (kg).
  3. Use the formula from above = C = mg / kg.
  4. Finally, calculate the concentration (C) in mg/kg.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem :

Use the following variables as an example problem to test your knowledge.

Amount of substance in milligrams (mg) = 500 mg

Mass in kilograms (kg) = 2 kg