Kelvin to Celsius Converter

How to convert Kelvin to Celsius?

To convert Kelvin to Celsius, you can use the following formula: **°C = K - 273.15**. Simply subtract 273.15 from the Kelvin temperature.

T_(°C) = T_(K) - 273.15

Example

Convert 293.15K to Celsius:

T_(°C) = 293.15K - 273.15 = 20°C

What is the formula to convert Kelvin to Celsius?

Subtract 273.15 from the Kelvin value: °C = K − 273.15. The offset is exact by SI definition.

What is 0 K in Celsius?

0 K equals −273.15 °C, the absolute zero of temperature. No physical system can be cooled below this point — the third law of thermodynamics forbids reaching it exactly.

What is 300 K in Celsius?

300 K = 26.85 °C, close to room temperature on a warm day. Physicists often use 300 K as a convenient 'room temperature' reference because the arithmetic is simpler than 293.15 K (20 °C).

Why is Kelvin used in physics instead of Celsius?

Kelvin is an absolute scale starting at true zero, so it appears directly in physical laws (PV=nRT, Stefan-Boltzmann T⁴, Wien's law). Celsius offsets are arbitrary relative to water's freezing point.

What is the surface temperature of the Sun in Celsius?

About 5778 K = 5504.85 °C. The temperature of the corona above is much higher (1-3 million K), one of solar physics' enduring puzzles.

How do I read color temperature in Kelvin?

Lower K = warmer/yellower light (candle 1800 K = 1526.85 °C), higher K = cooler/bluer (overcast sky 6500 K = 6226.85 °C). The 'temperature' refers to a black-body radiator producing that color.

Is liquid nitrogen colder than dry ice in Kelvin and Celsius?

Yes. Liquid nitrogen boils at 77 K = −196.15 °C. Dry ice (frozen CO₂) sublimates at 194.65 K = −78.5 °C. Nitrogen is the colder common cryogen by ~118 K.

Does the Kelvin-to-Celsius conversion change with the 2019 SI redefinition?

The 273.15 offset is unchanged. The redefinition only changed how the kelvin's size is defined (now via Boltzmann constant, previously via triple point of water). Conversions stay identical for everyday use.

Popular Kelvin to Celsius conversion table