Chi or CHI may refer to:

Greek

*Chi (letter), the Greek letter (uppercase Χ, lowercase χ);

Chinese

*Chi (length), ''Chi'' (length) (尺), a traditional unit of length, about ⅓ meter *Chi (mythology) (螭), a dragon *Chi (surname) (池, pinyin: ''chí'') *qi , ''Ch'i'' or ''qi'' (氣), "energy force" *Chinese language (ISO 639-2 code "chi") *Ji (surname), various surnames written Chi in Wade–Giles

Arts and entertainment

*Chi (2013 film), ''Chi'' (2013 film), a Canadian documentary *Chi (2019 film), ''Chi'' (2019 film), a Burmese drama *''Chi: Chikyū no Undō ni Tsuite'', a manga series by Uoto *''The Chi'', an American drama series created by Lena Waithe for Showtime *Chi (Chobits), Chi (''Chobits''), a character in ''Chobits'' media *Sailor Chi, a villain in the ''Sailor Moon'' manga *Chi, a character in ''Chi's Sweet Home'' media *"Chi", a song by Korn from ''Life Is Peachy''

Science and mathematics

*Trigonometric integral#Hyperbolic cosine integral, Chi, the hyperbolic cosine integral *A symbol for electronegativity

People

*Chi Cheng (musician) (1970–2013), American musician *Chi McBride (born 1961), American actor *Chi Onwurah (born 1965), British politician

Other uses