1/4 or or may refer to:

The calendar date January 4, in month-day format The calendar date 1 April in day-month format 1st Battalion, 4th Marines, an infantry battalion in the US Marine Corps A fraction of one fourth, one quarter, 25% or 0.25 1/4 (single album), by South Korean band Onewe

See also Fourth (disambiguation) Quarter (disambiguation) Number Forms, a Unicode block containing characters that have specific meaning as numbers