V12 or V-12 may refer to: Technology V12 engine, a V engine with twelve cylinders in two banks of six Victor V12, a HP-12C Platinum calculator clone Military V-12 Navy College Training Program, in the United States during World War II Mil V-12, the largest helicopter ever built Pilatus OV-12, a planned military version of the PC-6 STOL aircraft Rockwell XFV-12, an experimental 1970s American V/STOL aircraft project Vultee V-12, a 1930s American attack aircraft Other Simpiwe Vetyeka, a boxer nicknamed "V12"