Here's how to convert 15,000 degrees Fahrenheit to Celsius:

Formula:

°C = (°F - 32) × 5/9

Calculation:

1. Subtract 32: 15,000 - 32 = 14,968

2. Multiply by 5/9: 14,968 × (5/9) = 8,315.56

Therefore, 15,000 degrees Fahrenheit is approximately 8,315.56 degrees Celsius.