Temperature ConversionK → °C

Kelvin to Celsius Converter

Convert kelvin (K) to celsius (°C) using documented conversion factors. Includes interactive calculations, conversion formula, worked steps, and common reference tables.

Temperature Converter

Live Interactive Calculator

Value to Convert

Source Unit

Converted Result

-272.15°C

Target Unit

Summary:1 K = -272.15 °C

Formula:°C = K − 273.15

Conversion Formula

To convert from kelvin to celsius, apply the mathematical formula:

°C = K − 273.15

Where K represents kelvin and °C represents celsius.

Conversion Factor

The base relationship defined under primary measurement standards:

Subtract 273.15 from the Kelvin temperature.

Reference: BIPM 26th CGPM Resolution 1

Understanding Temperature Scale Conversions

Unlike length or weight conversions, which are purely multiplicative ratios, temperature conversions between Kelvin and Celsius require an affine transformation (both multiplication and an offset) because their zero points are defined differently:

Water Freezing Point

0 °C = 32 °F = 273.15 K

Water Boiling Point

100 °C = 212 °F = 373.15 K

Crossover Parity

-40 °C = -40 °F

The difference between freezing and boiling is 100 degrees on the Celsius scale and 180 degrees on the Fahrenheit scale. This yields the exact step ratio:

180 ÷ 100 = 9/5 = 1.8 (Each 1 °C change equals 1.8 °F change)

To convert from Celsius to Fahrenheit, multiply the Celsius temperature by 1.8 (or 9/5) and then add the 32° offset. To convert from Fahrenheit to Celsius, subtract the 32° offset first and then multiply by 5/9 (approximately 0.5556).

How to Convert Kelvin to Celsius

Converting measurements between kelvin and celsius follows a structured calculation process:

Identify the quantity in kelvin (K) that you wish to convert.
Apply the temperature scale formula: °C = K − 273.15.
The resulting value is the equivalent amount expressed in celsius (°C).

Common Kelvin to Celsius Reference Table

Frequently referenced values calculated using documented measurement conversion factors.

Kelvin (K)	Celsius (°C)	Arithmetic Expression
0 K	-273.15 °C	0 − 273.15
77 K	-196.15 °C	77 − 273.15
273.15 K	0 °C	273.15 − 273.15
298.15 K	25 °C	298.15 − 273.15
300 K	26.85 °C	300 − 273.15
373.15 K	100 °C	373.15 − 273.15
500 K	226.85 °C	500 − 273.15
1,000 K	726.85 °C	1,000 − 273.15

Worked Calculation Examples

Practical step-by-step calculations showing how to convert kelvin to celsius with exact mathematical equations.

Example 10 K → °C

0 K − 273.15 = -273.15 °C

Application context: Absolute zero (-273.15 °C)

Calculation Steps:

1.Subtract 273.15 from 0 K: 0 − 273.15 = -273.15 °C.

Calculated Output:-273.15 °C

Example 277 K → °C

77 K − 273.15 = -196.15 °C

Application context: Liquid nitrogen boiling point (-196.15 °C)

Calculation Steps:

1.Subtract 273.15 from 77 K: 77 − 273.15 = -196.15 °C.

Calculated Output:-196.15 °C

Example 3273.15 K → °C

273.15 K − 273.15 = 0 °C

Application context: Water ice point (0 °C)

Calculation Steps:

1.Subtract 273.15 from 273.15 K: 273.15 − 273.15 = 0 °C.

Calculated Output:0 °C

Example 4373.15 K → °C

373.15 K − 273.15 = 100 °C

Application context: Water steam point (100 °C)

Calculation Steps:

1.Subtract 273.15 from 373.15 K: 373.15 − 273.15 = 100 °C.

Calculated Output:100 °C

About the Units

Authoritative technical specifications and historical definitions for both units.

Source Unit

Kelvin (K)

The Kelvin is the SI base unit of thermodynamic temperature. Absolute zero (0 K) corresponds to the complete absence of classical thermodynamic thermal energy.

System: si

Base Unit: kelvin

Authoritative Source: BIPM 26th CGPM Resolution 1

Target Unit

Celsius (°C)

The Celsius temperature scale is defined such that 0 °C is 273.15 K (the approximate freezing point of water) and 100 °C is 373.15 K. An interval of 1 °C equals 1 Kelvin.

System: metric

Base Unit: kelvin

Authoritative Source: BIPM SI Brochure / NIST SP 811

Inverse Conversion