Hg

HG, Hg or hg can have many meanings:

• Hg is the chemical symbol for the element Mercury
• Hg is the astronomical symbol for the planet Mercury.
• hg is the symbol for hectogram (100 grams) in the SI system. See 1 E-1 kg for comparisons.
• HG is one half of comedy duo Roy and HG.
• HG is the militia movement of Slovak People's Party,HG is known as Hlinka Guard