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In the world, 計 (Kai , Jì , 計 ) is a common gender-neutral first name. The forename 計 is habitual in Macao, where it is quite a common gender-neutral name, Guam, where it is quite a common girly name, and Hong Kong, where it is quite a common dominantly masculine, but seldom girly name (explore the name in all countries). Not in comparison with a country's population, the name is most common in India, Germany, and the United States. Likewise, 計 is the last name as well as the forename.
計 is also a popular name for the fictitious and mythical characters: Kai Bartley , the fictional character from Grey's Anatomy; Kai Shiden , the fictional character from Mobile Suit Gundam; Kai von Mölln , the character from Thomas Mann's Buddenbrooks; Kai , the imaginary figure from the TV series ''Lego Ninjago", The Lego Ninjago Movie and Kai , the character in The Legend of Korra, and in many other works.