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Kelvin to Celsius Converter

Convert Kelvin to Celsius and Celsius to Kelvin instantly. Bidirectional temperature converter with formula and common values.

K

Celsius

36.85

°C

310 K = 36.85 °C

°C = K − 273.15

How to Convert Kelvin to Celsius

To convert Kelvin to Celsius, subtract 273.15. The Kelvin scale is an absolute thermodynamic scale starting at absolute zero (-273.15°C), making the conversion a simple offset with no multiplication required.

Conversion Formula

  • Kelvin to Celsius: °C = K − 273.15
  • Celsius to Kelvin: K = °C + 273.15

Common Conversions

KelvinCelsius
0-273.15
77-196.15
233-40.15
273.150
310.1537
373.15100
57785504.85

When to Use Kelvin

Kelvin is the SI base unit of temperature used in physics, chemistry, and engineering. Color temperature of light sources, gas law equations, and thermodynamic calculations all rely on the Kelvin scale.

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FAQ

How do I convert Kelvin to Celsius?

Subtract 273.15 from the Kelvin value. For example, 373.15 K − 273.15 = 100°C.

What is 0 Kelvin in Celsius?

0 Kelvin equals -273.15°C. This is absolute zero, the lowest theoretically possible temperature where all molecular motion stops.

Why does the Kelvin scale start at absolute zero?

Lord Kelvin designed the scale so that zero represents the complete absence of thermal energy. This makes Kelvin ideal for scientific calculations involving thermodynamics and gas laws.

Is a degree Kelvin the same size as a degree Celsius?

Yes, one kelvin increment is exactly the same magnitude as one degree Celsius. The scales differ only by their starting point: 0 K = -273.15°C.