Temperature units
All scales supported by Free Temperature Converter.
Celsius
°C
Celsius is the metric temperature scale where water freezes at 0 °C and boils at 100 °C at standard pressure.
Fahrenheit
°F
Fahrenheit is common in the United States. Water freezes at 32 °F and boils at 212 °F at standard pressure.
Kelvin
K
Kelvin is the SI absolute temperature scale. 0 K is absolute zero; water freezes at 273.15 K.
Rankine
°R
Rankine is an absolute Fahrenheit-based scale used in engineering. 0 °R is absolute zero.
Réaumur
°Ré
Réaumur is a historical scale where water freezes at 0 °Ré and boils at 80 °Ré.