Gratis is a term in Latin and various Romance and Germanic languages (e.g. English, Spanish, French, Portuguese, Romanian, Danish, Swedish, German, Norwegian, Dutch, Catalan) meaning free, in the sense that one does not have to pay for some good or service (free of charge).

In hacker slang, another common term for gratis is free as in beer, as opposed to free, libre or free as in speech. This expression (as well as gratis itself) is used to distinguish gratis software from free software, which is free as in freedom.