A flueric multiplier stage is disclosed which comprises two fluid amplifiers whose power streams are respectively connected to opposite sides of a first pressure differential signal and whose control ports are connected in parallel across a second pressure differential signal. The output receivers of the fluid amplifiers are cross-connected such that the left receiver of the first amplifier is connected to the right receiver of the second amplifier, the structure described being adapted to provide a push-pull output signal which is proportional to the product of two push-pull input signals. Circuits incorporating the basic multiplier stage are also disclosed, as are circuits in which the output is restricted to respond to a singularly directional input.