🌡️Kelvin Converter

Convert between Kelvin and Celsius temperature scales.

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Celsius (°C)

Kelvin (K)

K = °C + 273.15 | Absolute zero = 0 K = −273.15 °C

About Kelvin Converter

Convert between Kelvin and Celsius temperature scales. Kelvin is the SI base unit of temperature where 0 K is absolute zero, the coldest possible temperature. The conversion formula is simple: K = °C + 273.15. Used extensively in science, physics, and thermodynamics.

How to Use Kelvin Converter

1
Enter your value
Type a temperature in either the Celsius or Kelvin field.
2
See the result
The conversion appears instantly in the other field.
3
Copy the result
Click copy to use the converted temperature.

Common Use Cases

Physics and chemistry temperature calculations
Astronomy and astrophysics temperature data
Thermodynamics and engineering applications
Converting scientific literature temperatures

Frequently Asked Questions

How do you convert Celsius to Kelvin?

Add 273.15 to the Celsius temperature. For example, 100°C = 373.15 K.

What is absolute zero in Celsius?

Absolute zero is 0 Kelvin, which equals −273.15°C — the theoretical minimum temperature.

Why does Kelvin not use the degree symbol?

Kelvin is a base SI unit and is named after Lord Kelvin. By international convention, it is written as K without the degree (°) symbol.

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