Celsius to Rankine Converter
Enter °C value below for instant °R result. Batch mode handles multiple inputs.
| Celsius (°C) | Rankine (°R) | Context |
|---|---|---|
| 0 | 491.67 | Ice melts |
| 20 | 527.67 | Comfortable indoor |
| 37 | 536.33 | Normal body temp |
| 100 | 671.67 | Water boils |
| -273.15 | 0 | Absolute zero |
Rankine adds 459.67 to Fahrenheit, and Fahrenheit is Celsius times 9/5 plus 32. Combined:
°R = (°C × 9/5) + 491.67
- Multiply °C by 9/5 (or 1.8).
- Add 491.67 (equivalent of 32°F + 459.67°R offset).
Example: 25°C → (25 × 1.8) + 491.67 = 45 + 491.67 = 536.67°R.
Visual alignment: °R starts at absolute zero, °C at water freeze.
- Thermodynamics: Rankine cycle for steam turbines uses °R for efficiency calcs.
- Aerospace: Jet engines spec in °R for high-temp materials.
- US cryogenics: Liquid nitrogen at 135.6°R (-320°F equivalent).
Rankine, devised by William Rankine in 1859, shifts Fahrenheit to absolute zero (0°R). Celsius centers on water (0-100). US engineering favors °R for absolute temps; metric zones use Kelvin (close to °C + 273.15).
Why use Rankine over Kelvin?
Rankine matches Fahrenheit intervals, suiting US imperial systems. Kelvin aligns with Celsius.
Is °R always positive?
Yes, absolute zero is 0°R—no negative values possible.
Batch conversion limit?
Up to 10 lines; separate by newlines for quick lists.
National Institute of Standards and Technology. (2023). Thermodynamic Properties of Water. NIST Steam Tables.
ASHRAE Handbook. (2021). Fundamentals, Chapter 1: Thermodynamics. American Society of Heating, Refrigerating and Air-Conditioning Engineers.
Mackay, A. L. (1991). Dictionary of Scientific Quotations. Institute of Physics Publishing.