18f to c

Step 1: Identify the conversion factor

The conversion factor from fahrenheit to celsius is:

1 fahrenheit = -0.432111 celsius

Step 2: Set up the calculation

To convert 18 fahrenheit to celsius, multiply 18 by the conversion factor -0.432111:

18×-0.432111

Step 3: Calculate

18×-0.432111=-7.778

Step 4: Round the result

The result is approximately: -7.78 celsius

Final Answer:

18 fahrenheit is approximately -7.78 celsius.