Here's how to convert 400 degrees Fahrenheit to Celsius:

Formula:

°C = (°F - 32) × 5/9

Calculation:

1. Subtract 32 from the Fahrenheit temperature: 400°F - 32 = 368

2. Multiply the result by 5/9: 368 × 5/9 = 204.44°C (approximately)

Therefore, 400 degrees Fahrenheit is approximately 204.44 degrees Celsius.