Here's how to convert 30 degrees Fahrenheit to Celsius:

Formula:

Celsius = (Fahrenheit - 32) * 5/9

Calculation:

1. Subtract 32 from Fahrenheit: 30 - 32 = -2

2. Multiply by 5/9: -2 * 5/9 = -1.11 (approximately)

Therefore, 30 degrees Fahrenheit is approximately -1.11 degrees Celsius.