Humidity Calculator

Calculate absolute humidity, dew point, and wet-bulb temperature from air temperature and relative humidity.

About This Tool

Relative humidity compares current moisture to the maximum at a given temperature. This calculator uses Magnus saturation vapor pressure, ideal-gas absolute humidity, and an iterative wet-bulb solution at standard sea-level pressure (1013.25 hPa). Results update in real time as you type.

Calculator

Temperature Unit

Air Temperature (Dry-Bulb)

Relative Humidity

Valid range: dry-bulb −40 °C to 60 °C (−40 °F to 140 °F); relative humidity 0–100%.

Results

            Absolute Humidity
            Water vapor mass per volume of air (g/m³)
          
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            Dew Point Temperature
            Temperature at which air becomes saturated
          
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            Wet-Bulb Temperature
            Ventilated wet-bulb reading at the same pressure
          
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Actual Vapor Pressure Partial pressure of water vapor (hPa)

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Saturation Vapor Pressure Maximum vapor pressure at dry-bulb temperature (hPa)

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Mixing Ratio Water vapor mass per dry-air mass (g/kg)

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How to Use

Choose Celsius or Fahrenheit.
Enter dry-bulb temperature and relative humidity (0–100%).
View results below — each row includes a short description.
Use Copy to copy results or Clear to reset.