6/8

6/8 may refer to:
 * A fraction equivalent to 3/4 or 0.75.
 * June 8 (month-day date notation)
 * 6 August (day-month date notation)
 * 6/8 time, a time signature used in Western musical notation
 * 6 shillings and 8 (old) pence in UK pre-decimal currency = 80d or 1⁄3 of a pound sterling
 * A mediaeval English coin called a noble; later a notional value of 1⁄3 of a pound sterling
 * 6/8 vision, a measure of visual acuity in metric units