6W or 6-W may refer to:
Units of measurement 6°W, or 6th meridian west, a longitude coordinate 6 watts 6 weeks 6 wins, abbreviated in a Win–loss record (pitching)
Other 6W, IATA code for Saravia Dublin 6W, see List of Dublin postal districts 06W, a designation for Typhoon Ora (1972) 6W, the production code for the 1985 Doctor Who serial The Two Doctors 6w (locomotive), a type of locomotive under the Whyte notation
See also W6 (disambiguation)