3/2 may refer to:
Numbers and dates The fraction three-over-two (), equal to one and one-half (), or in decimal form 1.5 March 2 (month-day notation) 3 February (day-month notation)
Photography A common aspect ratio (image)
Music A triple metre time signature Perfect fifth, an interval whose frequency ratio is 3 to 2 Triplet (music) Hemiola
Military 3rd Battalion, 2nd Marines