Degrees Celsius to degrees Rankine
Type a value in degrees Celsius to see it in degrees Rankine straight away, or type in the second box to convert back.
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How to use it
- Type the value in the degrees Celsius box.
- Read the result in degrees Rankine as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
°R = °C × 1.8 + 491.67
Multiply by 1.8, then add 491.67, because the two scales have different zero points.
Example
To convert 25 °C to degrees Rankine: 25 × 1.8 + 491.67 = 536.67 °R.
Conversion table
| Degrees Celsius (°C) | Degrees Rankine (°R) |
|---|---|
| -40 | 419.67 |
| -20 | 455.67 |
| -10 | 473.67 |
| 0 | 491.67 |
| 10 | 509.67 |
| 20 | 527.67 |
| 25 | 536.67 |
| 30 | 545.67 |
| 37 | 558.27 |
| 40 | 563.67 |
| 50 | 581.67 |
| 100 | 671.67 |
About the units
- Degree Celsius
- A degree Celsius is the same size as a kelvin, but the scale is shifted so that K = °C + 273.15 exactly. Water freezes at 0 °C and boils at about 100 °C at standard pressure.
- Degree Rankine
- An absolute scale that starts at absolute zero with Fahrenheit-sized degrees, so °R = K × 9/5 exactly. It appears in some US thermal engineering work.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
What is 0 degrees Celsius in degrees Rankine?
0 °C = 491.67 °R. The formula is °R = °C × 1.8 + 491.67.
How do I convert degrees Celsius to degrees Rankine?
Use °R = °C × 1.8 + 491.67. For example, 25 °C = 536.67 °R.
How many degrees Celsius are in one degree Rankine?
1 °R = -272.594 °C.
Why is temperature conversion not a simple multiplication?
Celsius and Fahrenheit do not start at absolute zero, so converting needs an offset as well as a factor. For example °F = °C × 9/5 + 32, which is why 0 °C is 32 °F, not 0.
At what temperature are Celsius and Fahrenheit equal?
At minus 40: -40 °C is exactly -40 °F.