Supercooled Water - Vapor Pressure vs. Temperature

Undercooled water and vapor pressure. Water can be supercooled without becoming a solid at standard pressure down to almost 224.8 K (−48.3 °C, −55 °F) if it is pure and free of nucleation sites. This tool displays the relationship between temperature and vapor pressure for supercooled water.

Temperature (°C)Vapor Pressure (kPa)
00.6112
-50.4218
-100.2865
-150.1913
-200.1255
-250.08078
-300.05094
-350.03141
-400.01891

Unit Conversion

  • 1 Pa = 1.45×10⁻⁴ psi (lbf/in²)

Physical Properties

Water freezes at 273.15 K (0 °C, 32 °F) but can remain liquid (supercooled) at standard pressure down to approximately 224.8 K (−48.3 °C, −55 °F) when pure and free of nucleation sites.