A kilogram is the base unit of mass in the International System of Units (SI) and it was originally defined as the mass of one liter of water.
A milligram (mg) is also a unit of mass or weight and it is equal to one thousandth of a gram.
Formula to convert mg to kg.
To convert mg to kg we need to know how they are related.
We know that 1 kg is equivalent to 1,000,000mg, therefore, to convert mg to kg, we divide the mg value by 1,000,000.
Mass in kg = Mass in mg ÷ 1,000,000
Convert 500,000 mg to kg.
= 500,000 ÷ 1,000,000
= 0.5 kg.