Short Facts - -40 degrees Celcius = -40 degrees Fahrenheit

You know.. -40 degrees Celcius is exactly the same as -40 degrees Fahrenheit

To convert from Celsius to Fahrenheit, multiply by 9, divide by 5, and add 32.
Proof: -40 Celsius = (-40 x 9) / 5 +32 = -40 degrees Fahrenheit.