Rankine scale
| Rankine | |
|---|---|
| Unit of | Temperature |
| Symbol | °R or °Ra |
| Named after | W. J. M. Rankine |
| Conversions | |
| 1 °R in ... | ... is equal to ... |
| Kelvin | 273.15 K |
| Celsius | 0.00 °C |
| Fahrenheit | 32.00 °F |
The Rankine scale is a thermodynamic (absolute) temperature scale. It is based around absolute zero. Rankine is similar to the kelvin scale in that it starts at absolute zero and 0 °Ra is the same as 0 K but is different as a change of 1 °Ra is the same as a change of 1 °F (Fahrenheit) and not 1 °C (Celsius). Note that the abbreviation °R is ambiguous, as it can also refer to the Réaumur scale.
The Kelvin and Rankine temperature scales are defined so that absolute zero is 0 kelvins (K) or 0 degrees Rankine (°R). The Celsius and Fahrenheit scales are defined so that absolute zero is −273.15 °C or −459.67 °F. Sometimes the unit is referred to without the degree symbol, similar to the kelvin.
The Rankine scale was originally used in the United States and France.
