Form factor or form-factor may refer to:

Manufacturing

Form factor (design) Form factor is a hardware design aspect that defines and prescribes the size, shape, and other physical specifications of components, particularly in electronics. A form factor may represent a broad class of similarly sized components, or it may ...

, an aspect of design which defines and prescribes the size, shape, and other physical specifications of hardware components, particularly in electronics and electronic packaging **

Form factor (mobile phones) The form factor of a mobile phone is its size, shape, and style, as well as the layout and position of its major components. With one non-movable section Bar A bar (also known as a slab, block, candybar) phone takes the shape of a cuboid, usuall ...

Computer form factor Form factor is a hardware design aspect that defines and prescribes the size, shape, and other physical specifications of components, particularly in electronics. A form factor may represent a broad class of similarly sized components, or it may ...

, the specifications of computer motherboards ** Hard disk drive form factor * FormFactor (company), a semiconductor test and measurement company, acquired Cascade Microtech in 2016

Scattering theory

Form factor (quantum field theory) In elementary particle physics and mathematical physics, in particular in effective field theory, a form factor is a function that encapsulates the properties of a certain particle interaction without including all of the underlying physics, but ...

, a semi-empirical formula used in effective quantum field theories *

Atomic form factor In physics, the atomic form factor, or atomic scattering factor, is a measure of the scattering amplitude of a wave by an isolated atom. The atomic form factor depends on the type of scattering, which in turn depends on the nature of the incident ...

, or atomic scattering factor, a measure of the amplitude of a wave scattered from an isolated atom *

Electric form factor The electric form factor is the Fourier transform A Fourier transform (FT) is a mathematical transform that decomposes functions into frequency components, which are represented by the output of the transform as a function of frequency. Most c ...

, the Fourier transform of electric charge distribution in space *

Magnetic form factor In electromagnetism, a magnetic form factor is the Fourier transform of an electric charge distribution in space. See also For the form factor relevant to magnetic diffraction of free neutrons by unpaired outer electrons of an atom see also: atomi ...

, the Fourier transform of an electric current distribution in space

Other sciences

Form factor (electronics) In electronics or electrical engineering the form factor of an alternating current waveform (signal) is the ratio of the RMS (root mean square) value to the average value (mathematical mean of absolute values of all points on the waveform). It i ...

, characterizing the functional form of oscillating signals * Form factor (radiative transfer) or view factor, the proportion of energy transmitted by that object which can be transferred to another object * Form factor in timber metrics, referring to tree shape