Kelvin to Celsius Converter (K to °C)

Use this free online Kelvin to Celsius converter to quickly convert K to °C. Simply enter the temperature in Kelvin, and the tool will instantly display the equivalent in Celsius.

How to Convert Kelvin to Celsius

Converting K to °C only requires an offset, since both scales use the same size of degree — only their zero points differ. To convert, subtract 273.15 from the Kelvin value.

Formula: °C = K − 273.15

Example: Convert 300 K to °C. 300 − 273.15 = 26.85°C So, 300 K is equal to 26.85°C.

What is Kelvin?

Kelvin (K) is the SI base unit of temperature, used mainly in science and engineering. Unlike Celsius and Fahrenheit, Kelvin has no negative values — 0 K represents absolute zero, the point at which all molecular motion theoretically stops. Note that Kelvin is written without a degree symbol.

What is Celsius?

Celsius (°C), also known as centigrade, is a temperature scale where water freezes at 0°C and boils at 100°C at standard atmospheric pressure. It is the standard temperature unit used in most countries around the world.

Kelvin to Celsius Relationship

°C = K − 273.15 K = °C + 273.15

Since both scales share the same degree size, the conversion is a simple subtraction or addition, with no multiplication involved.

K to °C Conversion Table

Kelvin (K)	Celsius (°C)
0 K	−273.15°C
273.15 K	0°C
293.15 K	20°C
298.15 K	25°C
310.15 K	37°C
373.15 K	100°C
773.15 K	500°C

Solved Examples

Example 1: Convert 350 K to °C. 350 − 273.15 = 76.85°C

Example 2: Convert 250 K to °C. 250 − 273.15 = −23.15°C

Example 3: What is 0 K in °C? 0 K equals −273.15°C, the coldest possible temperature (absolute zero).

Frequently Asked Questions