system unit unit-
code
abbrev-
iation
notes sample
default conversion
combinations
SI kilogram kg kg 1.0 kg (2.2 lb)
  • kg lb
    • kg lb st
  • kg st
    • kg st lb
gram g g 1.0 g (0.035 oz)
  • g oz
milligram mg mg 1.0 mg (0.015 gr)
  • mg gr
microgram μg (ug
or mcg)
μg 1.0 μg (1.5×10−5 gr)