Here's how to convert -28 degrees Celsius to Fahrenheit:

Formula:

F = (C * 9/5) + 32

Where:

* F = Fahrenheit

* C = Celsius

Calculation:

1. Multiply Celsius by 9/5: -28 * 9/5 = -50.4

2. Add 32: -50.4 + 32 = -18.4

Therefore, -28 degrees Celsius is equal to -18.4 degrees Fahrenheit.