12A may refer to:
Media content ratings including the following: 12A, a current certificate issued by the British Board of Film Classification 12A issued by the Irish Film Classification Office 12A issued in Malta and Nigeria, documented at Motion picture content rating system A type of Mazda Wankel engine Any of the several highways numbered 12A Refrigerant HC-12a consisting of propane and isobutane, a replacement for R-12