Convert Rankine to Celsius

Enter the temperature in Rankine below to get the value converted to Celsius.

Results in Degrees Celsius:
Loading content.
1 °R = -272.594444 °C
Do you want to convert Celsius to Rankine?

How to Convert Rankine to Celsius

Thermometers measure temperature and come in many forms and sizes

Convert degrees Rankine to degrees Celsius with this simple formula:

degrees Celsius = ( [°R] - 491.67 ) × 5 / 9

Insert the [°R] temperature measurement in the formula and then solve to find the result.

For example, let's convert 50 °R to degrees Celsius:

50 °R = ( ( 50 - 491.67 ) × 5 / 9 ) = -245.372222 °C

Rankine and Celsius are both units used to measure temperature. Keep reading to learn more about each unit of measure.


The Rankine scale is an absolute temperature scale that uses absolute zero as the starting point, much like the Kelvin scale. The key difference between the Rankine scale and the Kelvin scale is that an increment of one degree rankine is equal to an increment of one degree Fahrenheit, not Celsius as in the Kelvin scale. The base of the Rankine scale starts at absolute zero, thus 0 degrees rankine are equal to −459.67 degrees Fahrenheit.

Rankine can be abbreviated as R, and are also sometimes abbreviated as Ra. For example, 1 degree Rankine can be written as 1 °R or 1 Ra.

Important Temperatures In Degrees Rankine

TemperatureDegrees Rankine
Absolute Zero0 °R
Freezing Point of Water491.67 °R
Triple Point of Water491.688 °R
Boiling Point of Water671.67 °R


The Celsius temperature scale, also commonly referred to as the centigrade scale, is defined in terms of the kelvin. Specifically, degrees Celsius is equal to kelvins minus 273.15.

The degree Celsius is the SI derived unit for temperature in the metric system. A degree Celsius is sometimes also referred to as a degree centigrade. Celsius can be abbreviated as C, for example 1 degree Celsius can be written as 1 °C.

Important Temperatures In Degrees Celsius

TemperatureDegrees Celsius
Absolute Zero-273.15 °C
Freezing Point of Water0 °C
Triple Point of Water0.01 °C
Boiling Point of Water100 °C

Rankine Measurements and Equivalent Celsius Conversions

Common Rankine values converted to the equivalent Celsius value
Rankine Celsius
-50 °R -300.93 °C
-40 °R -295.37 °C
-30 °R -289.82 °C
-20 °R -284.26 °C
-10 °R -278.71 °C
0 °R -273.15 °C
10 °R -267.59 °C
20 °R -262.04 °C
30 °R -256.48 °C
40 °R -250.93 °C
50 °R -245.37 °C
60 °R -239.82 °C
70 °R -234.26 °C
80 °R -228.71 °C
90 °R -223.15 °C
100 °R -217.59 °C
110 °R -212.04 °C
120 °R -206.48 °C
130 °R -200.93 °C
140 °R -195.37 °C
150 °R -189.82 °C
160 °R -184.26 °C
170 °R -178.71 °C
180 °R -173.15 °C
190 °R -167.59 °C
200 °R -162.04 °C
300 °R -106.48 °C
400 °R -50.93 °C
500 °R 4.6278 °C
600 °R 60.18 °C
700 °R 115.74 °C
800 °R 171.29 °C
900 °R 226.85 °C
1000 °R 282.41 °C

More Rankine Temperature Conversions

Convert to Fahrenheit
1 °R is equal to -458.67 °F
Convert to Kelvins
1 °R is equal to 0.555556 K
Convert to Delisle
1 °R is equal to 558.891667 °De
Convert to Newton
1 °R is equal to -89.956167 °N