Antoine Equation.

Solve for saturated vapor pressure.

Notes:

- This calculator uses a fitted equation to calculate the saturated vapor pressure. Therefore, the calculated values should be considered approximate. The equation is has a valid range of 1°C to 374°C and 4.89 mmHg to 162991 mmHg.
- The constants for the Antoine formula are located below. This calculator uses the first set of constants for temperatures below 100° Celsius. The equation requires temperature to be in Celsius and pressure in mmHg. This calculator automatically makes the conversion.
- Water will boil when the atmospheric pressure is less than the vapor pressure for a given temperature.

temperature = 0 = 0 celsius |

water vapor pressure = NOT CALCULATED |

Water Temperature Range | A | B | C |

1°C ≤ T ≤ 100°C | 8.07131 | 1730.63 | 233.426 |

99°C ≤ T ≤ 374°C | 8.14019 | 1810.94 | 244.485 |

Select to solve for a different unknown

Antoine Equation

Solve for saturated vapor pressure. | |

Solve for temperature. | |

Internet application to solve for the vapor pressure of water. This includes a line graph of temperature versus pressure. | |

Get this calculator on your Android smart phone or tablet. |

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