Buck formula, also known as Arden Buck equationīuck_pressure = 0.61121 * e^.Magnus formula, also known as August-Roche-Magnus or Magnus-Tetens equation.Jump to the next section to read more about the constants in the Antoine formula. The temperature T is expressed in degrees Celsius and the vapor pressure P is in mmHg. Simple_pressure = e^(20.386 - (5132 / (temperature + 273)), where vapor pressure is expressed in mmHg and temperature in kelvins.Īntoine_pressure = 10^ In our calculator you'll find implemented: The most well known and established is the Antoine equation, but other methods also exist (and they perform better in typical conditions). There are many different formulas thanks to which you can calculate the vapor pressure of water.
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