A microgram (symbol µg) is an SIunit of mass. It is defined as:
1 µg = 10−9kg = 1/1,000,000 of a gram.
See 1 E-9 kg for comparisons.
nanogram << microgram << milligram
\nCategory:SI derived units of mass
"I never miss a chance to have sex or appear on television."
- Gore Vidal