Celsius to Kelvin Converter

In scientific fields like physics, chemistry, and thermodynamics, temperature is a measure of the average kinetic energy of particles. While Celsius is convenient for daily life, the Kelvin scale is the primary unit in the International System of Units (SI) because it is an absolute scale. 0 Kelvin represents absolute zero, the theoretical point where all thermal motion ceases.

This tool is engineered for laboratory and academic precision. It strictly enforces the laws of thermodynamics by validating inputs against absolute zero (-273.15°C). Unlike generic converters, it offers a toggle between the standard scientific offset (273.15) and the simplified integer offset (273) often used in quick classroom estimations. This ensures that students and researchers can format their results exactly as required by their specific methodology.

The conversion is a linear shift. The Celsius and Kelvin scales have the same magnitude (a change of 1°C equals a change of 1K), but different zero points.

For rough mental calculations or significant figure simplification, the decimal is sometimes omitted:

Note: K cannot be negative. If C < -273.15, the physical state is undefined in classical thermodynamics.