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Rankine is a thermodynamic (absolute) temperature scale named after the Scottish engineer and physicist William John Macquorn Rankine, who proposed it in 1859.

## References

## See also

The symbol is R (or Ra if to distinguish it from the Rømer and Réaumur scales). As with the Kelvin scale (symbol: K), zero on the Rankine scale is absolute zero, but the Rankine degree is defined as equal to one degree Fahrenheit, rather than the one degree Celsius used by the Kelvin scale. A temperature of -459.67 °F is exactly equal to 0 R.

A few engineering fields in the U.S. measure thermodynamic temperature using the Rankine scale. However, throughout the scientific world where measurements are made in SI units, thermodynamic temperature is measured in kelvin.

Some key temperatures relating the Rankine scale to other temperature scales are shown in the table below.

Kelvin | Celsius | Fahrenheit | Rankine | |
---|---|---|---|---|

Absolute zero (by definition) | 0 K | −273.15 °C | −459.67 °F | 0 R |

Freezing point of water | 273.15 K | 0 °C | 32 °F | 491.67 R |

Triple point of water (by definition) | 273.16 K | 0.01 °C | 32.018 °F | 491.688 R |

Boiling point of water | 373.1339 K | 99.9839 °C | 211.9710 °F | 671.641 R |

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Last updated on Saturday October 04, 2008 at 14:24:23 PDT (GMT -0700)

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This article is licensed under the GNU Free Documentation License.

Last updated on Saturday October 04, 2008 at 14:24:23 PDT (GMT -0700)

View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation

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