Depends On How You Measure It.

Temperature Conversion

 

Scale Formulae And Conversion Equations

From	To	Formulae
Formulae Conversion Factors 9/5 = 1.8  9/4 = 2.25    10/8 = 1.25
Fahrenheit	Celsius	C = ( F - 32) / 1.8
Fahrenheit	kelvin	K = ( F + 459.67) / 1.8
Fahrenheit	Rankine	Ra =  F + 459.67
Fahrenheit	Réaumur	Re = ( F - 32) / 2.25
Celsius	Fahrenheit	F =  C × 1.8 + 32
Celsius	kelvin	K = C  + 273.15
Celsius	Rankine	Ra =  C × 1.8 + 32 + 459.67
Celsius	Réaumur	Re =  C × 0.8
kelvin	Celsius	C = K - 273.15
kelvin	Fahrenheit	F = K × 1.8 - 459.67
kelvin	Rankine	Ra = K × 1.8
kelvin	Réaumur	R = (K - 273.15) × 0.8
Rankine	Celsius	C = ( Ra - 32 - 459.67) / 1.8
Rankine	Fahrenheit	F =  Ra - 459.67
Rankine	kelvin	K =  Ra / 1.8
Rankine	Réaumur	Re = ( Ra - 32 - 459.67) / 2.25
Réaumur	Celsius	C =  Re × 1.25
Réaumur	Fahrenheit	F =  Re × 2.25 + 32
Réaumur	kelvin	K =  Re × 1.25 + 273.15
Réaumur	Rankine	Ra =  Re × 2.25 + 32 + 459.67

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