To convert from degrees Celsius into degrees Rankine, add 273.15, multiply by 9, and divide by 5. For example, 0 degrees Celsius is equal to (0 + 273.15) = 273.15 x 9 = 2458.35 / 5 = 491.67 degrees Rankine.
R = 9/5 (C + 273.15)
For every additional degree Celsius, the difference between Rankine and Celsius increases by 9 / 5 = 1.8 degrees - the same amount as it increases for x+1 degrees Fahrenheit.
Here is a small table:
0 degrees C = 491.67 Rankine.
1 degree C = 493.47 Rankine.
2 degrees C = 495.27 Rankine.
Similarly, for every increase of one degree Fahrenheit, the number of degrees Rankine increases by 1.
For example:
32 Fahrenheit = 491.67 Rankine
33 Fahrenheit = 492.67 Rankine.
To convert Celsius to Rankine, first convert Celsius to Kelvin by adding 273.15, then multiply by 9/5 or by 1.8 to get the Rankine temperature.
R = 9/5 (C + 273.15)
*Rankine is the Fahrenheit temperature scale re-adjusted to start at absolute zero, so it is also the Fahrenheit temperature plus 459.67 degrees. -459.67°F = 0 R
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Use this equation to convert Celsius to Rankine: ºR = (ºC x 1.8) + 491.67
Rankine temp = 1.8(Celsius temp) + 491.67
[°R] = [°C] × 9/5 + 491.67
In Celsius: 0.5556 In Kelvin: 273.71 In Rankine: 492.67
Use this formula: [°R] = [°F] + 459.67