C↔F ToolCelsius ↔ Fahrenheit

100.4°F to Celsius

100.4°F is 38.0°C (311.15 K). 100.4°F often indicates a fever when taken as body temperature. Use a reliable thermometer and clinical guidance.

Fahrenheit to Celsius

Instant two-way conversion with Kelvin and a live scale.

°F

Type to convert · Enter copies · Ctrl/⌘S swaps

Celsius°C
38.0°C

Celsius

38.0 °C

Fahrenheit

100.4 °F

Kelvin

311.1 K

Formula · worked example

°C = (100.4 − 32) × 5/9 = 38.0

Worked example

°C = (100.4 − 32) × 5/9 = 38.0

Context: fever range. Reverse lookup: 38.0°C to Fahrenheit.

Nearby Fahrenheit values

Quick hops around 100.4°F

FahrenheitCelsius
95°F35.0°C
96°F35.6°C
97°F36.1°C
98°F36.7°C
99°F37.2°C
100°F37.8°C
101°F38.3°C
102°F38.9°C
103°F39.4°C
104°F40.0°C
105°F40.6°C

More tools: Fahrenheit to Celsius · Celsius to Fahrenheit · Body temperature