100.4 Fahrenheit to Celsius
100.4 degrees Fahrenheit equals
38°C
38 degrees Celsius
100.4°F is 38°C, which falls inside the human body temperature range. Normal body temperature runs about 37°C (98.6°F), and anything above 38°C (100.4°F) is generally treated as a fever.
How to convert 100.4°F to °C
Formula
°C = (°F − 32) × 5/9
Substituting 100.4°F
- 100.4 − 32 = 68.4
- 68.4 × 5/9 = 38
Fahrenheit places the freezing point of water at 32 rather than 0, so that offset comes off first. What remains is then scaled by 5/9, because a Celsius degree covers 1.8 times as much temperature change as a Fahrenheit degree.
How 100.4°F compares
| Reference point | Temperature | Difference |
|---|---|---|
| Freezing point of water | 0°C / 32°F | 38°C (68.4°F) warmer |
| Room temperature | 21°C / 69.8°F | 17°C (30.6°F) warmer |
| Body temperature | 37°C / 98.6°F | 1°C (1.8°F) warmer |
| Boiling point of water | 100°C / 212°F | 62°C (111.6°F) colder |