1/12 may refer to:
- January 12 (month-day date notation)
- December 1 (day-month date notation)
- January 12 AD (month-year date notation)
- 1 AD December (year-month date notation)
- 1st Battalion, 12th Marines, an artillery battalion of the United States Marine Corps
- 1/12 or 1:12 scale
- Maximum slope of a wheelchair ramp under regulations in several countries
See also
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