Calculates the vapor pressure of water at a given temperature using various empirical formulas. The calculator provides results from the Antoine equation, the August equation, the Tetens equation, the Rankine equation, and the Clausius-Clapeyron equation. Note that these formulas are approximations and may have limitations in accuracy depending on the temperature range.
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Enter Temperature in the units shown.
Read Vapor Pressure (Clausius-Clapeyron Equation), Vapor Pressure (Rankine Equation), Vapor Pressure (Tetens Equation), Vapor Pressure (August Equation), and Vapor Pressure (Antoine Equation) in the results panel. Results update as you change the inputs.
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See the inputs and their calculated results.
Temperature: 25 °C
Vapor Pressure (Clausius-Clapeyron Equation): 531.6587952 Pa; Vapor Pressure (Rankine Equation): 3.187741617 mmHg; Vapor Pressure (Tetens Equation): 3.167673992 kPa; Vapor Pressure (August Equation): 23.57527946 mmHg; Vapor Pressure (Antoine Equation): 23.68641355 mmHg
Temperature: 37 °C
Vapor Pressure (Clausius-Clapeyron Equation): 1,071.441775 Pa; Vapor Pressure (Rankine Equation): 6.317203685 mmHg; Vapor Pressure (Tetens Equation): 6.274609562 kPa; Vapor Pressure (August Equation): 46.92182708 mmHg; Vapor Pressure (Antoine Equation): 46.95333823 mmHg
Temperature: 0 °C
Vapor Pressure (Clausius-Clapeyron Equation): 101.325 Pa; Vapor Pressure (Rankine Equation): 0.6097721463 mmHg; Vapor Pressure (Tetens Equation): 0.61078 kPa; Vapor Pressure (August Equation): 4.44851412 mmHg; Vapor Pressure (Antoine Equation): 4.542225795 mmHg
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