Celsius to Fahrenheit

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℉ =
℃ * 1.8000
+ 32.00
 
 
 
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More information: Celsius
More information: Fahrenheit
Fahrenheit to Celsius (Swap Units) Celsius to Fahrenheit table

For weather temperatures you can make a rough conversion from Celsius to Fahrenheit by doubling the figure and adding 30.

Absolute Zero -273.15℃ -459.67℉
Parity -40.00℃ -40℉
Freezing point 0℃ 32℉
Body Temperature 37℃ 98.6℉
Boiling point 100℃ 212℉

Celsius

Although initially defined by the freezing point of water (and later the melting point of ice), the Celsius scale is now officially a derived scale, defined in relation to the Kelvin temperature scale.

Zero on the Celsius scale (0℃) is now defined as the equivalent to 273.15K, with a temperature difference of 1 deg C equivalent to a difference of 1K, meaning the unit size in each scale is the same. This means that 100℃, previously defined as the boiling point of water, is now defined as the equivalent to 373.15K.

The Celsius scale is an interval system but not a ratio system, meaning it follows a relative scale but not an absolute scale. This can be seen because the temperature interval between 20℃ and 30℃ is the same as between 30℃ and 40℃, but 40℃ does not have twice the air heat energy of 20℃.

A temperature difference of 1 deg C is the equivalent of a temperature difference 1.8°F.

℉ =
℃ * 1.8000
+ 32.00
 
 
 

Fahrenheit

Fahrenheit is a thermodynamic temperature scale, where the freezing point of water is 32 degrees Fahrenheit (℉) and the boiling point 212℉ (at standard atmospheric pressure). This puts the boiling and freezing points of water exactly 180 degrees apart. Therefore, a degree on the Fahrenheit scale is 1/180 of the interval between the freezing point and the boiling point of water. Absolute zero is defined as -459.67℉.

A temperature difference of 1℉ is the equivalent of a temperature difference 0.556℃.

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