Kelvin to Celsius Calculator

The Kelvin and Celsius scales use identical degree increments — a change of 1 K is exactly equal to a change of 1 °C. The only difference between them is where they place zero. Celsius defines 0 °C as the freezing point of water at standard pressure, while Kelvin places 0 K at absolute zero, the theoretical minimum temperature where all molecular motion ceases. That offset is 273.15 degrees. To convert any Kelvin value to Celsius, subtract 273.15: °C = K − 273.15. For example, 300 K − 273.15 = 26.85 °C. Room temperature (~293–298 K), body temperature (310 K), and the boiling point of water (373.15 K) all become intuitive Celsius values through this single subtraction. The result is displayed to four decimal places to preserve the precision of scientific inputs, though most everyday applications only require one or two decimal places.