20 °R to °C — 20 degrees Rankine in degrees Celsius
Exact 20 × 0.55555556 − 273.15 = -262.038889
20 degrees Rankine in other units
| Degrees Celsius | -262.038889 | °C |
|---|---|---|
| Degrees Fahrenheit | -439.67 | °F |
| Kelvin | 11.111111 | K |
°R to °C at a glance
| Degrees Rankine | Degrees Celsius |
|---|---|
| 1 °R | -272.594444 °C |
| 2 °R | -272.038889 °C |
| 3 °R | -271.483333 °C |
| 5 °R | -270.372222 °C |
| 10 °R | -267.594444 °C |
| 20 °R | -262.038889 °C |
| 25 °R | -259.261111 °C |
| 50 °R | -245.372222 °C |
| 100 °R | -217.594444 °C |
| 250 °R | -134.261111 °C |
| 500 °R | 4.627778 °C |
| 1,000 °R | 282.405556 °C |
How to convert degrees Rankine to degrees Celsius
Multiply by -272.594444 — one degree Rankine is -272.594444 degrees Celsius. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 20 × 0.55555556 − 273.15 = -262.038889
In words: about minus two hundred sixty-two degrees Celsius.
What these units are
The degree Rankine and the degree Celsius are covered in the temperature unit guide, along with every other unit on this page.
Questions
How many degrees Celsius are in a degree Rankine?
One degree Rankine is -272.594444 degrees Celsius. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 20 degrees Rankine in degrees Celsius?
20 degrees Rankine is -262.038889 degrees Celsius. The working is 20 × 0.55555556 − 273.15 = -262.038889.
Why can't I just multiply to convert Celsius to Fahrenheit?
Because the two scales do not start in the same place. Zero Celsius is 32 Fahrenheit, so you have to shift as well as scale: multiply by 9/5, then add 32. Multiplying alone is right only for a temperature difference, never a temperature.
Where do the two scales meet?
At −40. Minus forty Celsius and minus forty Fahrenheit are the same temperature, which is the one value you can quote in either scale without converting.
Is it 'degrees Kelvin'?
No. Kelvin is written without the degree sign and without the word degree — 300 K, read as three hundred kelvin. It is an absolute scale, so there is no offset to name.
What is Rankine for?
Rankine is Fahrenheit's absolute scale: same size step, but starting at absolute zero instead of the Fahrenheit zero. It still turns up in US thermodynamics and aerospace work.