C↔F ToolCelsius ↔ Fahrenheit

104°F to Celsius

104°F is 40.0°C (313.15 K). 104°F is a high fever if this is body temperature. Persistent high fever warrants medical attention.

Fahrenheit to Celsius

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

°F

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

Celsius°C
40.0°C

Celsius

40.0 °C

Fahrenheit

104.0 °F

Kelvin

313.1 K

Formula · worked example

°C = (104 − 32) × 5/9 = 40.0

Worked example

°C = (104 − 32) × 5/9 = 40.0

Context: high fever range. Reverse lookup: 40.0°C to Fahrenheit.

Nearby Fahrenheit values

Quick hops around 104°F

FahrenheitCelsius
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
106°F41.1°C
107°F41.7°C
108°F42.2°C
109°F42.8°C

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