FP4 may refer to:
FP4 plus, an Ilford FP black-and-white photographic film Fourth Framework Programme (FP4), one of the EU Framework Programmes for Research and Technological Development FP4, a Roland Corporation electric piano Fairphone 4, a smartphone FP4, a 4-bit minifloat numeric representation used in machine learning
See also McQuesten Airport (TC LID: CFP4), Yukon, Canada