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# Convert Rankine to Celsius (R to C)

In next fields, kindly type your value in the text box under title [ From: ] to convert from rankine to celsius (R to C). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].

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Definitions:

Rankine (abbreviations: R, or °R, or deg R): is a thermodynamic temperature based on an absolute scale named with regard to the Glasgow University engineer and physicist William John Macquorn Rankine, who proposed it in 1859.

Celsius (abbreviations: C, or °C, or deg C): also known as centigrade, is a SI metric scale and unit of measurement for temperature and used by most countries in the world. It is named with regard to the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale.

## How to Convert Degree Rankine to Degree Celsius

### Example: How many degree Celsius are equivalent to 77.39 degree Rankine?

As;

1 degree Rankine = (X-491.67)*(5/9) degree Celsius

77.39 degree Rankine = Y degree Celsius

Assuming Y is the answer, and by substitution principle;

Y equals ( (77.39-491.67)*(5/9) ) over 1, where X is substituted by 77.39

(i.e.) Y = ( (77.39-491.67)*(5/9) ) / 1 = -230.15555555556 degree Celsius

Answer is: -230.15555555556 degree Celsius are equivalent to 77.39 degree Rankine.

### Practice Question: Convert the following units into C:

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 26.99 R

( ii ) 79.2 R

( iii ) 31.26 R

References
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