As a Wade-Giles Chinese language romanization, chi may refer to:

• Ch'i (traditional: 氣, simplified: 气), the word roughly meaning "life energy" and written qi or qì in Pinyin
• Chi (冀; in Pinyin: Jì), an abbreviation for the Chinese province of Hebei
• Chi (吉; in Pinyin: Ji), an abbreviation for the Chinese province of Jilin
• Chi, a traditional Chinese unit of length

Chi may also refer to:

• Chi (letter), in the Greek alphabet denoted by χ
• a deity in Igbo mythology
• Chi, an Italian magazine
• Chobits, a manga/anime character

CHI (in all capitals) may refer to:

• Chile, international country code CHI
• Collaborative human interpreter
• Computer-human interaction, included the related academic conference on the topic
• Crossover hotspot instigator, a sequence element of viral DNA involved in homologous recombination

In combination, chi can refer to:

• The Chi-square distribution, which is denoted by $\backslash chi\; ^2$
• the Chi River in North-East Thailand
• Chi McBride, African-American actor

Chi (Begriffsklärung) | Chi | Chi