Multiplier may refer to:

Mathematics

* Multiplier (arithmetic), the number of multiples being computed in multiplication * Constant multiplier, a constant factor with units of measurement * Lagrange multiplier, a scalar variable used in mathematics to solve an optimisation problem for a given constraint * Multiplier (Fourier analysis), an operator that multiplies the Fourier coefficients of a function by a specified function (known as the symbol) * Multiplier of orbit, a formula for computing a value of a variable based on its own previous value or values; see Periodic points of complex quadratic mappings * Characteristic multiplier, an eigenvalue of a monodromy matrix * Multiplier algebra, a construction on C*-Algebras and similar structures

Electrical engineering

* Binary multiplier, a digital circuit to perform rapid multiplication of two numbers in binary representation * Analog multiplier, a device that multiplies two analog signals * Frequency multiplier, a device that generates a signal at an integer multiple of its input frequency * Voltage multiplier, an electrical circuit that converts AC electrical power from a lower voltage to a higher DC voltage. * Schweigger multiplier, an early galvanometer

Macroeconomics

* Multiplier (economics), any measure of the proportional effect of an exogenous variable on an endogenous variable *

Fiscal multiplier In economics, the fiscal multiplier (not to be confused with the money multiplier) is the ratio of change in national income arising from a change in government spending. More generally, the exogenous spending multiplier is the ratio of change ...

, the ratio of the change in aggregate demand to the change in government spending that caused it * Money multiplier, the ratio of the money generated by the banking system to the central bank's increase in the monetary base that caused it

Others

* Force multiplier, in warfare a factor that dramatically increases the combat-effectiveness of a given military force * A multiplier

fishing reel A fishing reel is a hand-crank (mechanism), cranked reel used in angling to wind and stow fishing line, typically mounted onto a fishing rod, but may also be used on compound bows or crossbows to retrieve tethered arrows when bowfishing. Modern ...

creates less friction when casting * A CPU multiplier allows a CPU to perform more cycles per single cycle of the front side bus * Multiplier (linguistics), an adjective indicating number of times something is to be multiplied * '' Multipliers: How the Best Leaders Make Everyone Smarter'' {{disambiguation