MeasureCalc

Convert Kelvin (K) to Celsius (°C)

Category: Temperature

-272.15 celsius

1 kelvin = -272.15 celsius

Precision: 6 decimals; very small non-zero results use significant digits.

How to convert kelvin (k) to celsius (°c)

Temperature scales combine ratios and offsets. Kelvin is absolute (no negative values), Celsius offsets Kelvin by 273.15, and Fahrenheit uses a different step and zero point. Because offsets exist, temperature conversions require both a factor and an addition/subtraction.

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Quick conversion table

Handy values for Kelvin (K) to Celsius (°C). Click a value to calculate that result.

Kelvin (K) Celsius (°C)
-272.15
-272.65
-270.65
-263.15

Conversion formula

Use the following formula:

°C = K − 273.15

Temperature conversions use exact affine formulas (ratio + offset).

Common mistakes

  • Using only a ratio (×1.8 or ×0.555…) without adding/subtracting the offset (±32, +273.15).
  • Rounding too early; convert first, then round to the desired precision.

Unit facts

  • Kelvin (K): Kelvin (K) is the absolute thermodynamic scale; SI base unit for temperature.
  • Celsius (°C): Celsius (°C) is an offset scale: 0 °C at water’s freezing point, 100 °C at boiling (1 atm).

About Kelvin (K)

Kelvin (K)

Absolute SI scale starting at 0 K with no negative values. Used for thermodynamics, cryogenics, and color temperature (K).

History: Defined via the Boltzmann constant since 2019, linking temperature directly to energy at the particle level.

About Celsius (°C)

Celsius (°C)

Offset scale with 0 °C at water’s freezing point and 100 °C at boiling (at 1 atm). Converts to Kelvin by adding 273.15. Widely used in daily weather and science.

History: Named for Anders Celsius (1740s). Redefined through absolute thermodynamic scales as metrology advanced.

Frequently asked questions

How do I convert Kelvin (K) to Celsius (°C)?
Enter the temperature in Kelvin (K) and the calculator will apply the exact conversion formula to return the result in Celsius (°C).
Is Kelvin (K) to Celsius (°C) conversion exact?
Yes. Temperature conversions use exact affine formulas with a ratio and an offset.
Why does temperature conversion depend on the input value?
Unlike linear unit conversions, temperature scales do not start at the same zero point, so the conversion includes an offset.

Convert Kelvin (K) to other units

Convert other units to Celsius (°C)