# Scale

Scale or scales may refer to:

## Mathematics

* Scale (descriptive set theory), an object defined on a set of points
* Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original
* Scale factor, a number which scales, or multiplies, some quantity
* Long and short scales, how powers of ten are named and grouped in large numbers
* Scale parameter, a description of the spread or dispersion of a probability distribution
* Feature scaling, a method used to normalize the range of independent variables or features of data
* Scale (analytical tool)

## Measurements

* Scale (map), the ratio of the distance on a map to the corresponding actual distance
* Scale (geography)
* Weighing scale, an instrument used to measure mass
* Scale (ratio), the ratio of the linear dimension of the model to the same dimension of the original
* Spatial scale, a classification of sizes
* Scale ruler, a tool for measuring lengths and transferring measurements at a fixed ratio of length
* Vernier scale, the scale on calipers

## Music

* Scale (music), a sequence of ordered musical notes
* Scale (string instruments), the sounding length of the strings of an instrument
* Scale (album), a 2006 album by electronic artist Matthew Herbert
* "The Scale", a song from Our Love to Admire by Interpol

## Film and television

* Scale (film), an animated short film directed by Joseph Pierce
* Scales (film), a 2019 Saudi Arabian film
* "Scales" (The Cape), a 2011 television episode

## Science
### Biology

* Scale (zoology), a rigid plate which grows out of the skin of various animals
** Fish scale
** Reptile scale
*** Snake scale
* Scale (dermatology), a secondary skin lesion in humans that resembles animal scales
* Scale (insect anatomy), a feature of the wings of moths and butterflies
* Scale, a type of trichome, any flat epidermal outgrowth in botany
* Bulb scale, the storage layers of a plant bulb
* Scale insect, a waxy coated animal that resembles a fish scale

### Chemistry and materials science

* Fouling, sometimes called scale, a buildup of unwanted substances on a submerged surface
* Limescale, a hard, chalky deposit that often builds up inside kettles, hot water boilers, and pipework
* Mill scale, the flaky surface on hot rolled steel, consisting of iron oxides
* Scale (chemistry), the range of mass or volume of a chemical reaction or process

### Social sciences

* Rating scale, a type of informational measurement scale
* Scale (analytical tool), a concept in the study of complex systems and hierarchy theory
* Scale (social sciences), a tool for ordering entities by quantitative attributes

## Places

* Scales, California, a community in the United States
* Scales, Lancashire, part of the village of Newton-with-Scales
* Scales, near Kirkoswald, Cumbria, a hamlet
* Scales, Aldingham, Cumbria, England, a village
* The Scales, the initial climb of the Chilkoot Pass

## Other uses

* Scales (surname)
* Baron Scales, a title in the Peerage of England
* Libra (constellation), also known as "the scales", or the namesake astrological sign
* Mizan (Scale in English), a treatise on Islam by Javed Ahmed Ghamidi
* Pay scale, a system or structure of compensation for work
* Scale armour, an early form of armor
* Southern California Linux Expo, an open-source software conference held in Los Angeles, California