1/3 or 1⁄3 may refer to:

Dates[edit]

• January 3 (month-day date notation)
• 1 March (day-month date notation)
• January of the year 3 AD (month-year date notation)
• March of the year 2024 AD (year-month date notation)

Other uses[edit]

• 1⁄3, a fraction of one third, or 0.333333333... in decimal.
• pre-decimal British sterling currency of 1 shilling and 3 pence
• 1st Battalion, 3rd Marines, United States infantry battalion
• One/Three, a 20
• Loona 1/3, a Loona spin-off

See also[edit]

• Third (disambiguation)
• All pages with titles containing one third
• All pages with titles beginning with 1/3