Conversion between Celsius and

Integers and exact numbers In multiplication or division by an integer or an exact number, the uncertainty of the result is determined by the measured value. Some unit conversion factors are defined exactly, even though they are not whole numbers. For example, 1 in. is defined as exactly 2.54 cm and the 273.15 in the conversion between Celsius and Kelvin temperatures is exact so 100.000°C converts into 373.150 K. 

Absolute zero then occurs at —459. 67° F. It is straightforward to show that conversion between Celsius and Fahrenheit scales can be accomplished by ... 

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