How to convert degrees Rankine to degrees Celsius
°C = (°R − 491.67) × 5/9Temperature scales have different zero points, so the conversion needs an offset as well as a scale factor. In one step: °C = °R × 0.5555555556 − 273.15.
Worked examples
- 0 degrees Rankine(0 − 491.67) × 5/9 = −273.15 °C
- 491.67 degrees Rankine(491.67 − 491.67) × 5/9 = 0 °C
- 527.67 degrees Rankine(527.67 − 491.67) × 5/9 = 20 °C
- 671.67 degrees Rankine(671.67 − 491.67) × 5/9 = 100 °C
- 1,000 degrees Rankine(1,000 − 491.67) × 5/9 = 282.4055556 °C
Degrees Rankine to degrees Celsius conversion table
Values are calculated by the conversion engine using the full formula and rounded to 8 significant figures.
| Degrees Rankine (°R) | Degrees Celsius (°C) |
|---|---|
| 0 °R | −273.15 °C |
| 100 °R | −217.59444 °C |
| 200 °R | −162.03889 °C |
| 300 °R | −106.48333 °C |
| 400 °R | −50.927778 °C |
| 459.67 °R | −17.777778 °C |
| 491.67 °R | 0 °C |
| Degrees Rankine (°R) | Degrees Celsius (°C) |
|---|---|
| 500 °R | 4.6277778 °C |
| 527.67 °R | 20 °C |
| 600 °R | 60.183333 °C |
| 671.67 °R | 100 °C |
| 800 °R | 171.29444 °C |
| 1,000 °R | 282.40556 °C |
About the units
Degree Rankine (°R)
An absolute scale with Fahrenheit-sized degrees: 0 °R is absolute zero and 491.67 °R is the freezing point of water. Used in some US thermodynamics work.
Degree Celsius (°C)
Defined as the kelvin temperature minus 273.15. Water freezes at 0 °C and boils at about 100 °C at sea level; normal body temperature is about 37 °C.
Frequently asked questions
What is the formula to convert degrees Rankine to degrees Celsius?
°C = (°R − 491.67) × 5/9. Temperature scales have different zero points, so the conversion needs an offset as well as a scale factor. In one step: °C = °R × 0.5555555556 − 273.15.
What is 491.67 degrees Rankine in degrees Celsius?
491.67 °R = 0 °C.
What is 0 °R in °C?
0 °R = −273.15 °C.
Can I just multiply to convert degrees Rankine to degrees Celsius?
No. °R and °C have different zero points, so a single multiplication gives the wrong answer. Use the full formula above, or the converter. To convert a temperature difference (such as a 10-degree rise), use the temperature interval converter instead.
Is this °R to °C converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.