Why is temperature called Fahrenheit and Celsius?
Temperature is not called Fahrenheit or Celsius; temperature is measured in degrees Fahrenheit or degrees Celsius.
The names Fahrenheit and Celsius are derived from the creators of the temperature scales: Daniel Gabriel Fahrenheit and Anders Celsius.
To calculate Fahrenheit to Celsius, you take the temperature in Fahrenheit and multiply it by 0.8. Using the answer of that number, subtract 32 from it. That is your temperature in Celsius. To change that temperature back to Fahrenheit, you would add 32 to your Celsius temperature. After getting that answer, you divide it by 0.8 and Voislá, you're back at your temperature in Fahrenheit.
40 degrees fahrenheit is about 4.4 degrees celsius, while 10 celsius is 50 degrees fahrenheit so 40 fahrenheit is the colder temperature. The formulas to convert between celsius and fahrenheit temperatures (where F is the Fahrenheit temperature and C is the Celsius temperature in degrees) are as follows: Celsius to Fahrenheit: F = C × 9/5 + 32 Fahrenheit to Celsius: C = (F − 32) x 5/9