 | This article or section has multiple issues. Please help improve the article or discuss these issues on the talk page.- It needs additional references or sources for verification. Tagged since August 2007.
- It may require general cleanup to meet Wikipedia's quality standards. Tagged since March 2008.
|
Fahrenheit temperature conversion formulae | from Fahrenheit | to Fahrenheit |
|---|
| Celsius | = ( − 32) × 5⁄9 | = × 9⁄5 + 32 |
|---|
| Kelvin | = ( + 459.67) × 5⁄9 | = × 9⁄5 − 459.67 |
|---|
| Rankine | = + 459.67 | = − 459.67 |
|---|
For temperature intervals rather than specific temperatures,
1 °F = 1 °R = 5⁄9 °C = 5⁄9 K
Comparisons among various temperature scales |
Fahrenheit is a temperature scale named after Daniel Gabriel Fahrenheit (1686–1736), a German physicist who proposed it in 1724.
In this scale, the freezing point of water is 32 degrees Fahrenheit (°F) and the boiling point 212 °F (at standard atmospheric pressure), placing the boiling and freezing points of water exactly 180 degrees apart. A degree on the Fahrenheit scale is 1/180th part of interval between the ice point and steam point or boiling point. On the Celsius scale, the freezing and boiling points of water are 100 degrees apart, hence the unit of this scale. A temperature interval of one degree Fahrenheit is an interval of 5⁄9 of a degree Celsius. The Fahrenheit and Celsius scales coincide at −40 degrees (i.e. −40 °F and −40 °C describe the same temperature).
Absolute zero is −459.67 °F. The Rankine temperature scale was created to use degrees the same size as those of the Fahrenheit scale, such that a temperature difference of one degree Rankine (1 °R) is the same as a temperature difference of 1 °F, but with absolute zero being 0 °R.
