-21 c to f

Step 1: Identify the conversion factor

The conversion factor from celsius to fahrenheit is:

1 celsius = 0.27619 fahrenheit

Step 2: Set up the calculation

To convert -21 celsius to fahrenheit, multiply -21 by the conversion factor 0.27619:

-21×0.27619

Step 3: Calculate

-21×0.27619=-5.800

Step 4: Round the result

The result is approximately: -5.8 fahrenheit

Final Answer:

-21 celsius is approximately -5.8 fahrenheit.