Kelvin
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SI base unit of thermodynamic temperature
About Kelvin (K)
The kelvin is the SI base unit of thermodynamic temperature, with 0 K representing absolute zero -- the theoretical point where all molecular motion ceases. Scientists and engineers use kelvin in thermodynamics, astrophysics (the Sun's surface is about 5,778 K), and color temperature for lighting (e.g., 6500 K daylight).
- Category
- Temperature
- Symbol
- K
- Also known as
- kelvins
CONVERT TO
Frequently Asked Questions
What is a Kelvin (K)?
SI base unit of thermodynamic temperature
What is 1 Kelvin (K) in Celsius (°C)?
One Kelvin (K) equals -272.15 Celsius (°C).
What is 1 Kelvin (K) in Fahrenheit (°F)?
One Kelvin (K) equals -457.87 Fahrenheit (°F).
What is 1 Kelvin (K) in Rankine (°R)?
One Kelvin (K) equals 1.8 Rankine (°R).
How do I convert Kelvin to Celsius?
To convert Kelvin to Celsius, apply the formula °C = K − 273.15.