How many Celsius are in -70 F?

The Celsius and Fahrenheit scales meet at -40 degrees. This means that when you have -40 degrees Fahrenheit, you also have -40 degrees Celsius.

If you want to check this use the following equation:

Where F = degrees in Fahrenheit and C = degrees in Celsius, (F-32)*(5/9)=C.

(-40 F - 32)*(5/9) = -40 C