A microgram is a unit of mass that is one-millionth of a gram. A kilogram is the same mass as 1000 grams. One kilogram is equal to 1 billion micrograms, so the conversion value between kilograms and micrograms is 1,000,000,000. One billion can also be written as 10^9.
To convert kilograms to micrograms, multiply the number kilograms by 10^9. For example: 3 kilograms x 10^9 = 3,000,000,000 micrograms
The last step in converting kilograms to micrograms is to label the answer with the unit micrograms.