To convert 25 Fahrenheit to Celsius we can use the formula below: T (°C) = (25°F - 32) × 5/9. T (°C) = -3.889 °C. 25 °F = -3.889 °C. We conclude that twenty-five 25 Fahrenheit is equivalent to minus three point eight eight nine Celsius: 25 25 Fahrenheit is equal to -3.889 Celsius. Fahrenheit to Celsius conversion table