Convert Kelvin to Celsius

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Conversion Formula:

°C = K - 273.15

Convert Kelvin to Celsius (K to °C) instantly with accurate, readable results.

Accurately convert temperatures between Celsius, Fahrenheit, Kelvin, and other scales with our Temperature Unit Converter. Ideal for science, weather monitoring, cooking, and engineering, this tool ensures fast and reliable temperature unit conversions

From unit

Kelvin (K) — the SI base unit of thermodynamic temperature

It is defined by fixing the Boltzmann constant at exactly 1.380649×10⁻²³ J/K; zero kelvin is absolute zero, the lowest possible thermodynamic temperature. Used worldwide in science, engineering, physics, chemistry, astronomy, materials science, cryogenics, and temperature calculations.

  • Symbol: K
  • System: SI base unit for thermodynamic temperature
  • Exact relations: K = °C + 273.15; °C = K − 273.15
  • Fahrenheit equivalents: °F = (K × 9/5) − 459.67; 273.15 K = 32 °F; 373.15 K = 212 °F
  • Typical examples: absolute zero is 0 K; water freezes at 273.15 K; room temperature is about 293–295 K.
To unit

Celsius (°C) — a metric temperature scale based on the kelvin

It is defined by a fixed offset from the kelvin, the SI base unit for thermodynamic temperature; a temperature in degrees Celsius equals the kelvin temperature minus exactly 273.15. Used worldwide for weather, cooking, medicine, science, engineering, HVAC, climate data, and everyday temperature measurements.

  • Symbol: °C
  • System: Non-SI unit accepted for use with SI; derived from kelvin
  • Exact relations: °C = K − 273.15; K = °C + 273.15
  • Fahrenheit equivalents: °F = (°C × 9/5) + 32; 0 °C = 32 °F; 100 °C = 212 °F
  • Typical examples: water freezes at 0 °C; comfortable room temperature ~20–22 °C; normal human body temperature ~37 °C.