Water Vapor Pressure Calculator

Enter the temperature in Celsius into the calculator below to determine the water vapor pressure.

Water Vapor Formula

The following formula is used to calculate the saturate water vapor pressure.

P = 0.61*e(18.68-T/234.5)*(T/(257.14+T)

  • Where P is the saturated vapor pressure (kPA)
  • T is the temperature (C)

How to calculate water vapor pressure?

  1. First, measure the temperature of the air.

    If necessary, convert the temperature into units of Celsius.

  2. Next, enter the temperature into the formula.

    Calculate the water vapor pressure using the temperature from step 1 and the formula above.

  3. Finally, analyze the results.

    Do the results make logical sense? If so, you have your answer, if not, check the calculation.

FAQ

What is water vapor pressure?

A water vapor pressure is the specific pressure or maximum pressure required at any given temperature for the water vapor in air to be at equilibrium.

What is the formula for what vapor pressure?

The following formula is used to calculate the water vapor pressure.

water vapor pressure calculator
water vapor formula

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