Temperature
°Cto°R
Convert degrees Celsius (°C) to degrees Rankine (°R).
Converter
°C
Accepts numbers or expressions, e.g. 150 + 14.7
Result
°R
Rendered to 6 significant figures.
Formula
Formula
°R = (°C + 273.15) × 9⁄5
Temperature conversions involve different scale zero-points, so a single multiplicative factor does not exist. Apply the formula to each value individually.
Worked example
Convert 25 °C to °R.
- 0125 + 273.15 = 298.1500
- 02298.1500 × 9⁄5 = 536.6700 °R
Result25 °C = 536.67 °R
Conversion table
| °C | °R |
|---|---|
| -40 | 419.67 |
| -20 | 455.67 |
| 0 | 491.67 |
| 20 | 527.67 |
| 25 | 536.67 |
| 50 | 581.67 |
| 100 | 671.67 |
| 150 | 761.67 |
| 200 | 851.67 |
| 500 | 1391.7 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the formula to convert °C to °R?
Temperature conversions are not a single multiplier because the scales have different zero points. Use °R = (°C + 273.15) × 9⁄5 to convert any value of °C to °R.
How do I convert 1 °C to °R?
1 °C corresponds to 493.47 °R. Apply the formula °R = (°C + 273.15) × 9⁄5 to your value.
How do I convert °R back to °C?
Use the inverse formula. For example, to go from °R back to °C, rearrange °R = (°C + 273.15) × 9⁄5 for °C. See the °R to °C page for the direct formula.
When would I need to convert degree Celsius to degree Rankine?
Temperature scale conversions are routine in process engineering: instrumentation often reads in °C or °F, while thermodynamic calculations (gas laws, enthalpy) require absolute units (K or °R). Always use absolute units for any equation involving a ratio of temperatures.
Is the conversion exact?
Yes — the temperature scale relationships are exact by definition (the Celsius–Kelvin offset is 273.15 exactly; the Fahrenheit–Rankine offset is 459.67 exactly).