Celsius to Kelvin

Convert celsius degrees to kelvin degrees with ease.

Tool Type: Temperature Converter
Conversion: °C ⇄ K

Celsius to Kelvin

Convert Celsius to Kelvin
°C
Enter the temperature in Celsius to convert

How to Convert Temperature

1
Enter Celsius

Input temperature in Celsius

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Conversion Formula

Celsius to Kelvin

K = °C + 273.15

Example: 0°C = 0 + 273.15 = 273.15 K

Kelvin to Celsius

°C = K - 273.15

Example: 273.15 K = 273.15 - 273.15 = 0°C

Common Temperature Reference

Description Celsius (°C) Kelvin (K)
Absolute Zero -273.15 0
Freezing Point of Water 0 273.15
Room Temperature 20 293.15
Body Temperature 37 310.15
Boiling Point of Water 100 373.15

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Complete Guide to Kelvin Temperature Scale

Understanding the Kelvin Scale

The Kelvin scale is the SI (International System of Units) base unit of temperature used in science, physics, and chemistry. Unlike Celsius and Fahrenheit, which are relative temperature scales, Kelvin is an absolute temperature scale that starts at absolute zero (0 K), the point at which all molecular motion theoretically stops. The conversion between Celsius and Kelvin is simple: just add 273.15 to the Celsius temperature. The Kelvin scale is essential for scientific work, laboratory measurements, and any application requiring an absolute reference point for temperature.

Why Kelvin is Used in Science

The Kelvin scale is the standard in scientific research because it's an absolute scale. This means there are no negative temperatures in Kelvin - the lowest possible temperature is 0 K (absolute zero). This makes it ideal for thermodynamic calculations, gas laws, and scientific equations. Most scientific and technical equations for temperature require Kelvin rather than Celsius or Fahrenheit. It's also the official SI unit for temperature, making it the international standard for scientific measurement.

Key Characteristics of Kelvin Scale

  • Absolute Scale: 0 K is absolute zero, the lowest possible temperature
  • No Negative Values: All Kelvin temperatures are positive numbers
  • SI Unit: The international standard unit for temperature
  • No Degree Symbol: Written as K, not °K
  • Used in Science: Standard in physics, chemistry, and engineering
  • Same Increments: Each Kelvin is the same size as one Celsius degree

The Constant 273.15

The number 273.15 represents the offset between the Celsius and Kelvin scales. This comes from the fact that 0°C (the freezing point of water) equals 273.15 K. The decimal point 0.15 accounts for the precise placement of absolute zero at -273.15°C. This constant is fundamental to the relationship between the two scales and must be used for accurate conversions.

Common Applications of Kelvin

  • Physics: Thermodynamics, gas laws, and quantum mechanics
  • Chemistry: Reaction rates, equilibrium calculations, and spectroscopy
  • Astronomy: Measuring star temperatures and cosmic phenomena
  • Engineering: Heat transfer calculations and material science
  • Cryogenics: Working with extremely low temperatures
  • Electronics: Thermal management and semiconductor design
Pro Tip: In scientific contexts, always use Kelvin for calculations and when dealing with ratios or percentages of temperature. The Kelvin scale's absolute nature makes it essential for accurate scientific work.

Frequently Asked Questions

The formula is: K = °C + 273.15. You simply add 273.15 to the Celsius temperature to get the equivalent Kelvin temperature.
Kelvin is an absolute temperature scale starting at absolute zero, making it ideal for scientific calculations, thermodynamics, and gas laws. It's also the SI unit standard internationally.
Absolute zero is 0 K in Kelvin and -273.15°C in Celsius. It's the lowest possible temperature in the universe where all molecular motion theoretically stops.
No, the Kelvin scale is primarily used in scientific and technical fields. Everyday temperatures are typically expressed in Celsius or Fahrenheit.
Yes! Our converter uses the standard mathematical formula K = °C + 273.15 and provides results accurate to 2 decimal places.
Yes! You can convert any Celsius temperature, including negative values. However, Kelvin values must remain positive (above 0 K).
Yes! Our temperature converter is completely free with no registration, subscriptions, or hidden fees. Convert unlimited temperatures anytime.
SI (International System of Units) is the worldwide standard measurement system. Kelvin was officially chosen as the SI base unit for thermodynamic temperature.

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