To convert 325 degrees Fahrenheit to Celsius, we can use the formula:

$$T(°C) = (T(°F) - 32) \times \frac{5}{9}$$

Using this formula, we get:

$$T(°C) = (325 - 32) \times \frac{5}{9} = 162.778$$

Therefore, 325 degrees Fahrenheit is equal to 162.778 degrees Celsius.