1 Kelvin to Celsius
1 Kelvin (K) equals
-272.15 °C
Using °C = K - 273.15
Convert Kelvin (K) to Celsius (°C) instantly. Formula: °C = K - 273.15.
Temperature Converter
5 units available
1 K = -272.15 °C
Formula:
°C = K - 273.15With your value: 1 K = -272.15 °C
Other Kelvin to Celsius conversions
Kelvin to Celsius Conversion Table
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0.5 | -272.65 |
| 1 | -272.15 |
| 2 | -271.15 |
| 5 | -268.15 |
| 10 | -263.15 |
| 15 | -258.15 |
| 20 | -253.15 |
| 25 | -248.15 |
| 50 | -223.15 |
| 100 | -173.15 |
| 250 | -23.15 |
| 500 | 226.85 |
| 1000 | 726.85 |
Celsius to Kelvin Conversion Table
| Celsius (°C) | Kelvin (K) |
|---|---|
| 0.5 | 273.65 |
| 1 | 274.15 |
| 2 | 275.15 |
| 5 | 278.15 |
| 10 | 283.15 |
| 15 | 288.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 50 | 323.15 |
| 100 | 373.15 |
| 250 | 523.15 |
| 500 | 773.15 |
| 1000 | 1,273.15 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Kelvin (K)
Temperature
Traceable to the kelvin, defined by fixing the Boltzmann constant at 1.380 649 × 10⁻²³ J/K. Celsius and Fahrenheit are exact affine transforms of the kelvin scale.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Celsius (°C)
Temperature
t/°C = T/K − 273.15. The degree Celsius has exactly the same magnitude as the kelvin.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Kelvin to Celsius
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: °C = K - 273.15
Reverse: K = °C + 273.15
Step-by-Step Example
- Start with your value in Kelvin. For example: 5 K
- Apply °C = K - 273.15
- The result is: -268.15 °C
About Kelvin
The Kelvin scale is the SI unit of temperature that starts at absolute zero (−273.15°C). It is used extensively in scientific research.
Fun Fact: At 0 Kelvin (absolute zero), all molecular motion stops. It has never been fully achieved in a laboratory.
Common uses: physics, astronomy, chemistry.
About Celsius
The Celsius scale sets 0°C as the freezing point and 100°C as the boiling point of water at standard pressure. It is used by most countries worldwide.
Fun Fact: Anders Celsius originally proposed a scale where 100° was freezing and 0° was boiling—it was later reversed!
Common uses: weather, cooking, science.
Frequently Asked Questions
What is 1 Kelvin in Celsius?
1 Kelvin equals -272.15 Celsius.
How many Celsius are in 1 Kelvin?
There are exactly -272.15 Celsius in 1 Kelvin.
What is the formula to convert Kelvin to Celsius?
The formula to convert Kelvin to Celsius is: °C = K - 273.15. For example, to convert 10 Kelvin to Celsius, you would apply the formula to 10.
What is a Kelvin?
The Kelvin scale is the SI unit of temperature that starts at absolute zero (−273.15°C). It is used extensively in scientific research.
What is a Celsius?
The Celsius scale sets 0°C as the freezing point and 100°C as the boiling point of water at standard pressure. It is used by most countries worldwide.
What are the common uses of Kelvin?
The Kelvin is commonly used in physics, astronomy, chemistry.
Related Temperature Conversions
Cite this page
UnitConvertLab. (2026). 1 Kelvin to Celsius. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-kelvin-to-celsius