Ena Shamrma (Station Head)

The freezing point of water is 0 degrees Celsius (°C). This is a fundamental constant that serves as one of the two defining fixed points on the Celsius temperature scale itself. The scale was designed by Anders Celsius in 1742, originally with 0 degrees as the boiling point of water and 100 degrees as the freezing point. It was later reversed to the convention we use today. Therefore, under standard atmospheric conditions (at sea level with an air pressure of 1 atmosphere), pure water will transition from its liquid state to its solid state (ice) at precisely 0 °C. This value is a cornerstone of thermodynamics, meteorology, cooking, and countless scientific and everyday applications. It's the baseline from which we understand cold weather, freezer temperatures, and phase changes.