Changes

The Fahrenheit temperature scale was invented by [[Daniel Gabriel Fahrenheit]] in 1724. He decided that the zero point should be the temperature of a mix of ammonium chloride and ice, because this was the very coldest temperature he could achieve in his laboratory. He decided to set 100 at the temperature of the human body. (Either he made his measurement inaccurately, or he was running a very slight fever at the time). On this scale, it turns out that water freezes at 32 degrees and boils at 212 degrees Fahrenheit.

The Fahrenheit temperature scale was invented by [[Daniel Gabriel Fahrenheit]] in 1724. He decided that the zero point should be the temperature of a mix of ammonium chloride and ice, because this was the very coldest temperature he could achieve in his laboratory. He decided to set 100 at the temperature of the human body. (Either he made his measurement inaccurately, or he was running a very slight fever at the time). On this scale, it turns out that water freezes at 32 degrees and boils at 212 degrees Fahrenheit.

To convert a temperature expressed in Celsius to Fahrenheit, subtract 32 and multiply the result by 5/9.  

To convert a temperature expressed in Celsius to Fahrenheit, multiply by 9/5 and add 32.  

To convert a temperature in Fahrenheit to Celsius, multiply by 9/5 and add 32.

To convert a temperature in Fahrenheit to Celsius, subtract 32 and multiply the result by 5/9.

The temperature -40 is the same in both scales.

The temperature -40 is the same in both scales.