Convert °C to K with our scientific temperature converter. Essential for physics, chemistry, and engineering calculations.
To convert Celsius to Kelvin, add 273.15 to the temperature. For example: 20°C = 20 + 273.15 = 293.15 K. Common conversions: 0°C = 273.15 K (freezing point), 100°C = 373.15 K (boiling point), -273.15°C = 0 K (absolute zero).
This converter uses the standard formula (K = °C + 273.15) for converting Celsius to Kelvin, the SI base unit for thermodynamic temperature.
This Temperature Converter converts Celsius to Kelvin using the standard formula K = °C + 273.15. The Kelvin scale is the SI base unit for temperature, essential for scientific calculations.
Standards: International System of Units, Measurement Canada Standards, Scientific Temperature Scales
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Uses the standard formula: K = °C + 273.15
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Canadian university students in chemistry and physics courses routinely read lab thermometers in Celsius but must express results in Kelvin for assignments and research papers. Whether you're calculating gas law problems at McGill, running calorimetry experiments at UBC, or writing a lab report at Waterloo, converting your bench-top Celsius readings to Kelvin is a daily requirement in Canadian science education.
The Kelvin scale is the SI base unit of thermodynamic temperature and is widely used in scientific and engineering applications. Named after Lord Kelvin (William Thomson), it's an absolute temperature scale that begins at absolute zero, where all molecular motion theoretically stops.
Unlike Celsius and Fahrenheit which use arbitrary reference points, Kelvin starts at the lowest possible temperature in the universe. The conversion from Celsius to Kelvin is simple because both scales use the same degree size - only the starting point differs by exactly 273.15 units.
Converting Celsius to Kelvin is straightforward with our scientific temperature converter. Follow these steps for accurate conversions every time.
Input any temperature value in Celsius. You can enter positive or negative Celsius values, though remember that -273.15°C is the lowest possible temperature.
The converter instantly displays the temperature in Kelvin. The conversion is automatic and happens in real-time as you type your value.
Check the formula and step-by-step calculation shown below to understand how the conversion works. This is helpful for learning and verification.
The SI base unit of thermodynamic temperature. An absolute temperature scale starting at 0 K (absolute zero), where no negative temperatures exist.
A relative temperature scale used in everyday measurements, defined by water's freezing point (0°C) and boiling point (100°C) at standard pressure.
The lowest possible temperature (0 K or -273.15°C) where all classical molecular motion ceases. A fundamental constant in thermodynamics.
A measure of the average kinetic energy of particles in a substance. Kelvin is the standard unit for expressing thermodynamic temperature.
This calculator is based on the following authoritative sources and research:
Bureau International des Poids et Mesures (BIPM) (2026)
View SourceImportant Note: Temperature conversions use internationally recognized formulas and standards. The converter provides accurate results for all practical applications including weather, cooking, and scientific work.
Common questions about converting Celsius to Kelvin
