Here's how to convert -33 degrees Fahrenheit to Celsius:

Formula:

Celsius = (Fahrenheit - 32) * 5/9

Calculation:

1. Subtract 32 from the Fahrenheit temperature: -33 - 32 = -65

2. Multiply the result by 5/9: -65 * (5/9) = -36.11 (approximately)

Therefore, -33 degrees Fahrenheit is approximately -36.11 degrees Celsius.