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|Temperature Unit Conversions|
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|Unit||Equivalent measurements, comments|
|Celsius scale||This scale sets the normal freezing point of water to 0 degrees Celsius and the normal boiling point of water to 100 degrees Celsius. Formerly called the Centigrade scale. A change of 1 degree Celsius equals a change of 9/5 = 1.8 degrees Fahrenheit. To convert a Celsius temperature to Fahrenheit, multiply by 9/5 and add 32. To convert a Celsius temperature to Kelvin, add 273.15|
|Kelvin scale||This scale sets the lowest obtainable temperature (absolute zero = the temperature at which all molecular motion completely ceases) to 0 degrees. A change of one degree Celsius = a change of one Kelvin, but a Celsius temperature is never equal to a Kelvin temperature. There are no negative temperatures in the Kelvin scale. To convert a Kelvin temperature to Celsius, subtract 273.15. Note: simply use "Kelvin" or "Kelvins", not "degrees Kelvin" when using this unit.|
|Fahrenheit scale||This scale sets the freezing point of water to 32 degrees Fahrenheit and the boiling point of water to 212 degrees Fahrenheit. A change of 1 degree Fahrenheit equals a change of 5/9 = 0.56 degrees Celsius. To convert a Fahrenheit temperature to Celsius, subtract 32 and multiply by 5/9.|
|Rankine scale||This is the Fahrenheit analog of the Kelvin scale. Absolute zero is set to zero and each change of one degree Rankine = a change of one degree Fahrenheit, but a Rankine and Fahrenheit temperature are never equal. Like the Kelvin scale, the Rankine scale has no negative temperatures.|
|Réaumur scale||This is an obsolete temperature scale where the freezing point of water is zero degrees Réaumur and the boiling point of water is 80 degrees Réaumur.|
|Notable Temperatures On The Various Temperature Scales|
|Note: All measurements are at 1 atm of pressure. See also: boiling point and freezing point.|
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Disclaimer: The information contained herein is believed to be true and accurate, however ILPI makes no guarantees concerning the veracity of any statement. Use of any information on this page is at the reader's own risk. ILPI strongly encourages the reader to consult the appropriate local, state and federal agencies concerning the matters discussed herein.