Water Vapor Calculators

Temperature to saturated water vapor pressure

(SWVP) in kPa and Torr

In this case, the term "temperature" is equivalent to dew point (dewpoint).

This calculator uses the Arden Buck equation, accurate from -40 to +50 ^oC.

Citation: Buck, A. 1981. J Appl Meteorol 20, 1527-1532

Enter a temperature in ^oC:

Click this button to calculate SWVP:

SWVP in kPa is:

SWVP in Torr is:

Ambient temperature and relative humidity to

water vapor pressure (WVP) in kPa and Torr

Here, the term "temperature" refers to ambient temperature, not dew point!

This calculator uses the Arden Buck equation, as above.

Enter ambient temperature in ^oC:

Enter relative humidity in percent:

Click this button to calculate WVP:

WVP in kPa is:

WVP in Torr is:

Water vapor pressure in kPa to dewpoint

This calculator is usable for water vapor pressures from 0.01 to 12 kPa.

Accuracy is 0.1-0.2^oC increasing to ca. 0.5^oC at the range boundaries.

Enter a water vapor pressure in kPa:

Click this button to calculate dewpoint:

Dewpoint in ^oC is: