104°F = 40°C
104 degrees Fahrenheit is equal to 40 degrees Celsius.
Convert Fahrenheit to Celsius
Type any value — the converter works in both directions.
104°F = 40°C
How the conversion works
The formula to convert Fahrenheit to Celsius is:
°C = (°F − 32) × 5/9
Applied to 104°F:
- 104 − 32 = 72
- 72 × 5/9 = 40°C
Is 104°F dangerous?
104°F (40°C) is a high fever that warrants prompt medical attention, especially in infants, young children, and people with weakened immune systems. In adults it is often still a routine infection, but the severity threshold most physicians use is 103°F (39.4°C), so 104°F means 'call and check today', not 'wait and see'.
What is 104 degrees Fahrenheit in Celsius?
104 degrees Fahrenheit is equal to 40 degrees Celsius (104°F = 40°C).
How do you convert 104°F to °C?
Use the formula °C = (°F − 32) × 5/9. Worked out for 104°F: 104 − 32 = 72, 72 × 5/9 = 40°C.
Is 104°F dangerous?
104°F (40°C) is a high fever that warrants prompt medical attention, especially in infants, young children, and people with weakened immune systems. In adults it is often still a routine infection, but the severity threshold most physicians use is 103°F (39.4°C), so 104°F means 'call and check today', not 'wait and see'.