Degree (temperature)

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The term degree is used in several scales of temperature. The degree symbol ° is usually used, followed by the initial letter of the unit, for example “°C” for degree(s) Celsius. A degree can be defined as a set change in temperature measured against a given scale, for example, one degree Celsius is one hundredth of the temperature change between the point at which water starts to change state from solid to liquid state and the point at which it starts to change from its liquid to gaseous state.

Scales of temperature measured in degrees[edit]

Common scales of temperature measured in degrees:

Unlike the degree Fahrenheit and degree Celsius, the kelvin is not referred to or written as a degree. The kelvin is the primary unit of temperature measurement in the physical sciences, but is often used in conjunction with the degree Celsius, which has the same magnitude.

Other scales of temperature:


"Degrees Kelvin" (°K) is a former name for the SI unit of temperature on the thermodynamic (absolute) temperature scale. Since 1967 it has been known simply as the kelvin, with symbol K (without a degree symbol).[1] Degree absolute (°A) is obsolete terminology, often referring specifically to the kelvin but sometimes the degree Rankine as well.


  • Boiling point of water: 100.0 °C / 212.0 °F
  • Melting point of ice: 0.0 °C / 32.0 °F
  • Typical human body temperature: 37.0 °C / 98.6 °F
  • Room temperature: 20 - 25 °C / 68 - 77 °F[2]

Temperature conversions[edit]




Rankine scale

Rømer scale

Newton scale

Delisle scale

Réaumur scale

All three of the major units of temperature are linearly dependent, and so the conversion between any of them is relatively straightforward. For instance, any temperature measured in °C can be calculated from a corresponding value in degrees Fahrenheit or Kelvin, We can also calculate the conversion between these scales as

degree - initial point/ boiling point - melting point = constant

The equations above may also be rearranged to solve for or , to give

See also[edit]


  1. ^ "Unit of thermodynamic temperature (kelvin) (International System of Units brochure, Section". International Bureau of Weights and Measures. Archived from the original on 2014-10-07.
  2. ^ "Metric system temperature (kelvin and degree Celsius)". Colorado State University - Lamar. Archived from the original on 2000-01-16. Retrieved 2009-02-10.