**Full name:** kelvin

**Plural form:** kelvins

**Symbol:** K

**Alternate spelling:** degree kelvin

**Category type:** temperature

**Scale factor:** 1

The SI base unit for temperature is the kelvin.

Valid units must be of the **temperature** type.

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The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvins is absolute zero (when molecular motion stops), and one kelvin is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water. The Celsius temperature scale is now defined in terms of the kelvin, with 0 °C corresponding to 273.15 kelvins, approximately the melting point of water under ordinary conditions.

kelvin to degree Rankine

kelvin to degree Réaumur

kelvin to degree Celsius

kelvin to degree newton

kelvin to degree Rømer

kelvin to degree Delisle