5/4

5/4 may refer to:
 * May 4 (month-day date notation)
 * 5 April (day-month date notation)
 * , a time signature containing five quarter notes per measure, see quintuple meter
 * Just major third
 * "5/4", a song (with the above time signature) by Sunny Day Real Estate from their 1995 album Sunny Day Real Estate
 * "5/4" (song), a song by Gorillaz from their 2001 album Gorillaz
 * "5/4", an instrumental song by Rammstein from their 2002 single Mutter
 * Five-quarter, or $1 1/4$″, a common lumber dimension