Vapor Pressure of Water at Different Temperatures

Water vapor pressure is the pressure exerted by water vapor molecules in the gaseous state. It is directly influenced by temperature: as temperature increases, the kinetic energy of water molecules increases, and more molecules transition from the liquid to the vapor phase. This results in an increase in water vapor pressure.

The following charts and table provide a comprehensive list of water vapor pressure at different temperatures under 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)

Click on the icon to switch between SI (kPa) and US customary (psi) units.