Kelvin to Celsius Converter

Kelvin to Celsius Converter

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Formula: °C = K − 273.15

How to convert Kelvin to Celsius

To convert Kelvin to Celsius, subtract 273.15. Formula: °C = K − 273.15. For example, 373.15 K − 273.15 = 100°C. Going the other way, add 273.15 to Celsius to get Kelvin.

The Kelvin and Celsius scales have the same size degree — only the zero point differs. 0 K = −273.15°C (absolute zero) while 0°C = 273.15 K (freezing point of water).

Kelvin is used in science, physics, and engineering. Celsius is used for everyday temperatures in most countries. Converting between them is essential for chemistry, thermodynamics, and physics problems.

Kelvin to Celsius conversion table

Kelvin (K) Celsius (°C) Description
0 K−273.15°CAbsolute zero
73.15 K−200°CLiquid nitrogen range
173.15 K−100°CExtreme cold
233.15 K−40°C−40°F (scales equal)
273.15 K0°CFreezing point of water
293.15 K20°CRoom temperature
298.15 K25°CStandard temperature
310.15 K37°CBody temperature
373.15 K100°CBoiling point of water
1273.15 K1000°CLava temperature

Frequently asked questions

What is 300 K in Celsius?
300 K = 26.85°C. Calculation: 300 − 273.15 = 26.85°C. This is a warm room temperature.
What is 0 K in Celsius?
0 K = −273.15°C. This is absolute zero — the coldest possible temperature where all molecular motion stops.
What is 373 K in Celsius?
373 K = 99.85°C ≈ 100°C. This is approximately the boiling point of water. The exact boiling point is 373.15 K = 100°C.
What is 310 K in Celsius?
310 K = 36.85°C ≈ 37°C. This is approximately normal human body temperature.
Why is Kelvin used in science instead of Celsius?
Kelvin starts at absolute zero making it an absolute scale. This is essential for gas laws and thermodynamic equations where negative temperatures would cause mathematical problems. Many physical laws only work correctly with Kelvin temperatures.