Rankine to Celsius Converter
Enter a value to instantly convert between temperature units.
Precision4 dp
1 Rankine = -272.5944 Celsius
Key Formulas
Celsius → Fahrenheit
°F = f(°C)Fahrenheit → Celsius
°C = f(°F)Celsius → Kelvin
K = f(°C)Kelvin → Celsius
°C = f(K)Formula
°C = (°R - 491.67) × 0.555556Rankine to Celsius requires two steps: first subtract 491.67 to get the temperature above absolute zero in Fahrenheit degrees, then convert to Celsius using the 5/9 factor. This appears in US thermodynamics converted to SI.
Source: NIST SP 811
Frequently Asked Questions
Real-World Examples
491.67°R equals 0°C — freezing point.
491.67 °R = 0 °C
671.67°R equals 100°C — boiling point.
671.67 °R = 100 °C
0°R equals -273.15°C — absolute zero.
0 °R = -273.15 °C
536.67°R equals 25°C — room temperature.
536.67 °R = 25 °C