Quick Answer:
°C = (°R × 5/9) – 273.15. To convert Rankine to Celsius, multiply by 5/9 and subtract 273.15.
Rankine and Celsius are used in engineering thermodynamics when absolute temperature is required in imperial or metric units.
Detailed Overview: Rankine to Celsius
The Rankine scale is an absolute temperature scale based on Fahrenheit degrees. The Celsius scale sets 0°C at water’s freezing point. Formula: °C = (°R × 5/9) – 273.15. Reverse: °R = (°C + 273.15) × 9/5. Used in US engineering thermodynamics and power plants. 671.67°R equals 100°C.
Conversion Reference Table
0°R = -273.15°C, 491.67°R = 0°C, 536.67°R = 25°C, 558.27°R = 37°C, 671.67°R = 100°C, 900°R = 226.85°C
Practical Calculation Example
Convert 720°R: °C = (720 × 5/9) – 273.15 = 126.85°C. Reverse: 200°C = (200 + 273.15) × 9/5 = 851.67°R
Key Takeaways
°C = (°R × 5/9) – 273.15. Multiply Rankine by 5/9 then subtract 273.15.
THE AUTORANK Editorial Note: When converting Rankine to Celsius, always subtract 273.15 at the end to preserve the absolute temperature relationship.
Frequently Asked Questions
Q: How do I convert Rankine to Celsius quickly?
A: Convert Rankine to Kelvin first, then subtract 273.15. Example: 900°R = 500 K, then 500 – 273.15 = 226.85°C.
A: Convert Rankine to Kelvin first, then subtract 273.15. Example: 900°R = 500 K, then 500 – 273.15 = 226.85°C.
Q: Is 491.67°R equal to 0°C?
A: Yes, 491.67°R equals exactly 0°C, water’s freezing point.
A: Yes, 491.67°R equals exactly 0°C, water’s freezing point.
The Rankine to Celsius factor of 5/9 minus 273.15 is essential for engineering thermodynamics.
Related Converters: Celsius to Rankine | Rankine to Kelvin