Convert between Celsius and Rankine. Commonly used in thermodynamics and engineering systems.
Last updated: March 2026 | By Patchworkr Team
Rankine is an absolute temperature scale like Kelvin, but uses Fahrenheit-sized degrees. It is mainly used in engineering and thermodynamics in the US.
Like Kelvin, Rankine starts at absolute zero (0°R = -459.67°F = -273.15°C), making it useful for thermodynamic calculations.
First convert to Kelvin (add 273.15), then scale to Fahrenheit-sized degrees (multiply by 9/5).
Same result as Formula #1, written in a more compact form (scale first, then add the Rankine offset).
Subtract the Rankine zero point offset (491.67), then scale down by 5/9.
Convert 25°C to Rankine (step-by-step)
Step 1: Add 273.15 to convert to Kelvin
Step 2: Multiply by 9/5 (or 1.8) to scale to Fahrenheit-sized degrees
| Celsius | Rankine |
|---|---|
| -273.15 °C | 0 °R |
| -50 °C | 403.67 °R |
| 0 °C | 491.67 °R |
| 10 °C | 509.67 °R |
| 20 °C | 527.67 °R |
| 25 °C | 536.67 °R |
| 37 °C | 558.27 °R |
| 50 °C | 581.67 °R |
| 100 °C | 671.67 °R |
| 500 °C | 1391.67 °R |
Add 273.15, then multiply by 9/5.
0°R, which equals -273.15°C or -459.67°F.
Rankine is absolute, starting at zero, making it better for thermodynamic equations.
Primarily in US engineering and aerospace fields.
491.67°R (freezing point of water).
No, Rankine cannot go below zero.
°R = K × 9/5. Same concept, different scale.
671.67°R (boiling point of water).
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