The film's title has entered the English language as an idiomatic expression. Typically used when describing something thoroughly, the respective phrases refer to upsides, downsides and the parts that could, or should have been done better, but were not.
The film was novelized in 1967 by Joe Millard as part of the "Dollars Western" series based on the "Man with No Name". The South Korean western movie The Good, the Bad, the Weird (2008) is inspired by the film, with much of its plot and character elements borrowed from Leone's film. In his introduction to the 2003 revised edition of his novel The Dark Tower: The Gunslinger, Stephen King revealed that the film was a primary influence for the Dark Tower series, and that Eastwood's character specifically inspired the creation of King's protagonist, Roland Deschain.