Relative Humidity Calculator Wet Bulb Dry Bulb

Enter your actual station pressure not the altimeter setting.

Relative humidity calculator wet bulb dry bulb. When the psychrometer is swung around by its attached chain or handle the air causes the water on the wick to evaporate which. Calculate dewpoint wet bulb temperature from relative humidity. At 100 relative humidity the wet bulb temperature is equal to the air temperature dry bulb temperature. There is a converter below this calculator if you only know the celsius temperature for the entries required.

Enter your actual station pressure not the altimeter setting. Relative humidity dewpoint temp c results. Dry bulb temperature t db can be measured with a simple thermometer as shown above. Enter a temperature wet bulb and actual station pressure.

If the dry and wet bulb temperatures are set to the same value the calculator will show the saturation mixing ratio the amount of water in saturated air at that temperature. It includes a dry bulb thermometer a wet bulb thermometer and a psychrometric chart a graph that plots the relationships between the dry and wet bulb temperature relative humidity and dew point at constant pressure. If the air is fully saturated 100 relative humidity the water cannot evaporate so both the wet and dry bulb temperatures are the same. Dry bulb temperature and.

In of mercury mm of mercury millibars hpa. The entry required is in fahrenheit degrees. Air humidity can be estimated by measuring. Dry bulb temp c.

In of mercury mm of mercury millibars hpa. A simple online weather calculator to find the dewpoint and the wet bulb temperature by knowing the values of relative humidity temperature and actual station pressure. Enter a temperature relative humidity and actual station pressure. By definition wet bulb temperature is the lowest temperature a portion of air can acquire by evaporative cooling only.

Relative humidity is measured using a device called a sling psychrometer this consists of 2 side by side conventional thermometers one of which the wet bulb thermometer has a wetted wick placed at the bottom the other the dry bulb thermometer has no wetted wick. Dewpoint is the atmospheric temperature below which water droplets begin to condense and become dew. Wet bulb temp c. This script will determine the relative humidity from the entered dry and wet bulb temperatures data.

Wet bulb temperature t wb can be measured with a standard thermometer with some wet clothing cotton or similar around the bulb. Enter the two different temperatures. Note that continuously air flow around the thermometer is important to evaporate.