Temperature converter
Temperature scales differ in both the size of a degree and the zero point. Celsius and kelvin share the same step; a Fahrenheit degree is 5/9 as large. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level.
Temperature units
- Degree Celsius (°C) — The degree Celsius (°C) is a unit of temperature in the International System of Units (SI). 25 degrees Celsius corresponds to 298.15 kelvins. This value is exact by definition.
- Degree Fahrenheit (°F) — The degree Fahrenheit (°F) is a unit of temperature in the United States customary system. 25 degrees Fahrenheit corresponds to 269.2611 kelvins. This value is exact by definition.
- Kelvin (K) — The kelvin (K) is a unit of temperature in the International System of Units (SI). It is the reference unit for all temperature conversions on this site.