# Water Saturation Pressure

## Water saturation pressure at temperatures ranging from 0 to 100oC and from 32 to 700oF - Imperial and SI Units

Water tends to evaporate or vaporize by projecting molecules into the space above its surface. If the space is confined the partial pressure exerted by the molecules increases until the rate at which molecules reenter the liquid is equal to the rate at which they leave. At this equilibrium condition the vapor pressure is the saturation pressure.

The saturation pressure of water depends on temperature as indicated below.

### Water Saturation Pressure - Imperial Units

Saturation pressure of water in pounds per square inch:

Temperature
- t -
(oF)
Absolute Vapor
Pressure

- pv -
(psia)
32 0.0885
40 0.1217
50 0.1781
60 0.2563
70 0.3631
80 0.5069
90 0.6979
100 0.9493
120 1.692
140 2.888
160 4.736
180 7.507
200 11.52
212 14.69
220 17.19
240 24.97
260 35.43
280 49.20
300 67.01
350 134.60
400 247.26
450 422.55
500 680.86
550 1045.43
600 1543.20
650 2208.40
700 3094.30

### Water Saturation Pressure - SI Units

Saturation pressure of water in newton per square meter (Pa):

Temperature
- t -
(oC)
Absolute Vapor
Pressure

- pv -
(103 Pa)
0 0.6105
5 0.8722
10 1.228
20 2.338
30 4.243
40 7.376
50 12.33
60 19.92
70 31.16
80 47.34
90 70.10
100 101.3

### Saturation Vapor Pressure of some other Liquids

• at 68 oF (20oC)
LiquidSaturation Vapor Pressure
(psia)(Pa abs)
Carbon tetrachloride 1.9 13100
Gasoline 8.0 55200
Mercury 0.000025 0.17
• 1 Pa = 10-6 N/mm2 = 10-5 bar = 0.1020 kp/m2 = 1.02x10-4 m H2O = 9.869x10-6 atm = 1.45x10-4 psi (lbf/in2)

## Related Topics

• Air Psychrometrics - The study of moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content
• Steam Thermodynamics - Thermodynamics of steam and condensate applications
• Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more

## Tag Search

• en: water vapor pressure saturation temperature
• es: vapor de agua de saturación de la presión de la temperatura
• de: Wasserdampfdruck Sättigungstemperatur

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