Hg

Hg or HG may refer to:

In science, medicine, and technology:

• Haplogroup, a group of similar haplotypes
• Hectogram, hg, a unit of mass equal one hundred grams
• Hyperemesis gravidarum, a severe form of morning sickness
• Mercury (element)'s chemical symbol
• hg, the driver program of Mercurial, a version control system

In other uses:

• Masaki Sumitani or HG, Japanese professional wrestler
• Hengwrt Chaucer or Hg, a manuscript of the Canterbury Tales
• His/Her Grace, a style used for various high ranking personages
• Hlinka Guard, a militia movement of the Slovak People's Party from 1938 to 1945
• House & Garden (magazine) or HG, a former American shelter magazine
• Niki (airline)'s IATA code
• High Grade, a line of Gundam models