Rankine degree (difference)
Temperature differenceexact by definition
A Rankine degree of difference is exactly 5/9 of a kelvin, the same size as a Fahrenheit degree. A change of 1 R° and a change of 1 F° are the identical interval; only the position of zero separates the two scales, and a difference has no position.
Watch out: Because the interval sizes match, US thermodynamic properties are frequently tabulated per °R while the temperatures beside them are in °F, and the two never need reconciling. That works for differences only. Substituting a Fahrenheit temperature into an equation that wants absolute temperature is the error Rankine exists to prevent.
| 1 | 0.55555556 |
One rankine degree (difference) in every temperature difference unit
| 555,556 | microkelvin (difference) (μK) | |
| 555.556 | millikelvin (difference) (mK) | |
| 555.556 | milli-Celsius degree (difference) (mC°) | |
| 1 | Fahrenheit degree (difference) (F°) | |
| 1 | Rankine degree (difference) (R°)this unit | |
| 0.555556 | kelvin (difference) (K) | |
| 0.555556 | Celsius degree (difference) (C°) | |
| 0.444444 | Réaumur degree (difference) (Ré°) |
Solvers that use temperature difference