Celsius to Kelvin Converter

Quickly convert Celsius to Kelvin with our easy-to-use Celsius to Kelvin Converter. Perfect for students, scientists, and anyone needing accurate temperature conversions in a snap.

°C to K Calculator

Checkout our other calculators, Basic Calculator, Hours CalculatorPercentage Increase Calculator, & more!

Importance of the Kelvin Scale

The Kelvin scale is very important in science, especially in physics and chemistry. It’s the standard unit for measuring temperature in the International System of Units (SI). The Kelvin scale starts at absolute zero, making it ideal for scientific calculations.

Key Points:

  • 0 K (absolute zero): This is the lowest possible temperature where all molecular motion stops.
  • Water Freezing Point: Water freezes at 273.15 K.
  • Water Boiling Point: Water boils at 373.15 K under standard conditions.
  • Thermodynamic Temperature: The Kelvin scale helps in understanding the thermodynamic temperature, which is crucial for many scientific studies.

Celsius to Kelvin Converter Formula

To convert temperatures from degrees Celsius to Kelvin, you need to add 273.15 to the Celsius value. This is because the Kelvin scale starts at absolute zero, which is -273.15°C.

Formula: K = °C + 273.15

Steps to Convert Celsius to Kelvin

Converting °C to Kelvin is simple and can be done in three easy steps:

  1. Identify the temperature in Celsius that you want to convert.
  2. Add 273.15 to the Celsius temperature.
  3. The sum is the temperature in Kelvin.

Example Conversion

Let’s convert 21.5 degrees Celsius to Kelvin. Using the formula, we add 273.15 to the Celsius value:


K = 21.5 + 273.15

K = 294.65

Therefore, 21.5 degrees Celsius is equal to 294.65 Kelvin.

a screenshot of a Celsius to Kelvin Converter & Calculator

Understanding Kelvin

The Kelvin scale is a unit of measure for temperature used primarily in the scientific community. Unlike the Celsius and Fahrenheit scales, Kelvin does not use the degree symbol (°). The Kelvin scale starts at absolute zero (0 K), which is the theoretical point where all molecular motion ceases. Important reference points on the Kelvin scale include the freezing point of water at 273.15 K and the boiling point of water at 373.15 K. The Kelvin scale is unique because it does not have negative numbers, making it ideal for scientific measurements.

Understanding Celsius

The Celsius scale, also known as centigrade, is a widely used temperature scale where 0 °C is the freezing point of water and 100 °C is the boiling point of water under standard atmospheric conditions. The scale was invented by Anders Celsius in 1742. It is commonly used around the world for everyday temperature measurements. Absolute zero, the lowest possible temperature where molecular motion stops, is -273.15 °C on the Celsius scale. Temperature readings such as 25 °C (twenty-five degrees Celsius) are common for indicating warm weather conditions.

You can also check out our Cool Symbols and CharactersFancy Text GeneratorTypewriter TextGothic TextCursive TextColor Picker, and Online Case Converter for more creative options.