18 degrees Fahrenheit = -7.78 degrees Celsius
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-18ºC = -0.4ºF / Use this equation to convert degrees Celsius/Centigrade (ºC) to degrees Fahrenheit (ºF): [°F] = [°C] × 1.8 + 32
-18 degrees Celsius = -0.4 degrees Fahrenheit
-18 degrees Celsius = -0.4 degrees Fahrenheit.
-18 degrees Celsius = -0.4 degrees Fahrenheit
18 degrees Celsius = 64.4 degrees Fahrenheit.