Dewpoint & Wet-bulb Temperature Calculator from Relative Humidity

Calculate Dewpoint and Wet-bulb Temperature

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Accurately calculate dewpoint temperature and wet-bulb temperature using relative humidity, dry-bulb temperature, and atmospheric pressure. This powerful tool is essential for HVAC professionals, meteorologists, and anyone interested in thermal comfort or environmental monitoring. Get precise results instantly!

Formula:

This calculator determines Dewpoint Temperature (Td) and Wet-bulb Temperature (Twb) using the following inputs:

  • Dry-bulb Temperature (Tdb): The ambient air temperature measured by a standard thermometer.
  • Relative Humidity (RH): The amount of water vapor in the air expressed as a percentage of the maximum amount the air can hold at the current temperature.
  • Atmospheric Pressure (P): The pressure exerted by the weight of the atmosphere.

The calculations utilize established psychrometric equations and empirical approximations (such as the Magnus formula for dewpoint and an iterative method for wet-bulb temperature involving saturation vapor pressure and the psychrometric constant) to ensure accuracy across various environmental conditions.

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