Temperature
Convert kelvin (K) to degree Rankine (°R). Temperature scales are affine, not just scaled — converting requires an offset as well as a factor, which is why °C and °F don't share a zero.
1 K = 1.8 °R
To convert kelvin to degree Rankine, apply °R = K × 1.8.
| K | °R |
|---|---|
| 1 | 1.8 |
| 2 | 3.6 |
| 5 | 9 |
| 10 | 18 |
| 25 | 45 |
| 50 | 90 |
| 100 | 180 |
| 250 | 450 |
| 500 | 900 |
| 1000 | 1800 |
Process temperatures are read in °C or °F; thermodynamic calculations use absolute K or °R.
A temperature difference is not the same as an absolute temperature: a 10 °C rise equals an 18 °F rise, but 10 °C does not equal 50 °F.
Worked example. A temperature of 423.15 K is 761.67 °R.
Use °R = K × 1.8. Temperature scales are affine, so the conversion needs both a multiplier and an offset — unlike a simple unit factor.
1 K equals 1.8 °R. Note that a temperature difference converts differently from an absolute temperature.
Process temperatures are read in °C or °F; thermodynamic calculations use absolute K or °R.