Here is a nice temperature converter. Look for yourself. Scroll down to related links and look at "Conversion of temperatures and formulas".
-150 degrees below 0 Celsius is equivalent to -238 degrees Fahrenheit.
Negative one hundred fifty degrees Celsius is equal to negative two hundred twenty two degrees Fahrenheit.
20 degrees Celsius = 68 degrees Fahrenheit 30 degrees Celsius = 86 degrees Fahrenheit.
31 degrees below zero Fahrenheit is equal to -35 degrees Celsius and 238 Kelvin.
-180 degrees Celsius is -292 degrees Fahrenheit.
185 degrees Celsius = 365 degrees Fahrenheit.
40 degrees Celsius = 104 degrees Fahrenheit.
840 degrees Celsius = 1,544 degrees Fahrenheit.
140 degrees Celsius is 284 degrees Fahrenheit.
43.5
18 degrees Fahrenheit = -7.7 degrees Celsius.
426 degrees Celsius = 798.8 degrees Fahrenheit