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Weather Calculator

by Tim Brice and Todd Hall

Vapor Pressure

Instructions: Enter an air temperature, a dewpoint temperature, or both.
If you want the saturated vapor pressure enter the air temperature:
Saturated vapor pressure:
  Fahrenheit Celsius Kelvin  millibars (mb)
 inches of mercury (in Hg)
 millimeters of mercury (mm Hg)
 hectopascals (hPa)
 kilopascals (kPa)
 pounds per square inch (psi)
If you want to calculate the actual vapor pressure, enter the dewpoint temperature:
Actual vapor pressure:
  Fahrenheit Celsius Kelvin  millibars (mb)
 inches of mercury (in Hg)
 millimeters of mercury (mm Hg)
 hectopascals (hPa)
 kilopascals (kPa)
 pounds per square inch (psi)
Relative humidity (requires both the air temperature and dewpoint temperature)
   %
Formula for the Vapor Pressure script
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