Form factor or form-factor may refer to:
Science and technology Computing and electronics Form factor (design), an aspect of design which defines and prescribes the size, shape, and other physical specifications Form factor (mobile phones) Motherboard form factor Hard disk drive form factor Form factor (electronics), the functional form of oscillating signals
Physics Form factor (quantum field theory), a semi-empirical formula used in effective quantum field theories Atomic form factor, or atomic scattering factor, a measure of the amplitude of a wave scattered from an isolated atom Electric form factor, the Fourier transform of electric charge distribution in space Magnetic form factor, the Fourier transform of an electric current distribution in space Form factor (radiative transfer), the proportion of energy transmitted by that object which can be transferred to another object
Other uses Form factor, the tree shape in forest inventory timber metrics FormFactor, Inc., a semiconductor test and measurement company
See also Structure factor, in condensed matter physics