Wet Bulb Dry Bulb Humidity Calculator

The wet bulb temperature might not be a widely known measure but it has some valuable functions.

Wet bulb dry bulb humidity calculator.

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 dry bulb temperature plus either wet bulb temp rh or dewpoint temp. The calculator will show the saturation mixing ratio in grams of water per kilogram of dry air of a given temperature if the dry and wet bulb temperatures are set to the same value. Stull 2011 for any pressure such as standard sea level pressure of 101 325 kpa the resulting calculated values of rh can be listed in psychrometric tables.

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. Dry bulb temp c. Wet bulb temp c.

There is a converter below this calculator if you only know the celsius temperature for the entries required. Calculate dewpoint wet bulb temperature from relative humidity. Snowmaking snow production needs low temperatures and when the humidity decreases the temperature rises. If the air is fully saturated 100 relative humidity the water cannot evaporate so both the wet and dry bulb temperatures are the same.

In of mercury mm of mercury millibars hpa. Note that continuously air flow around the thermometer is important to evaporate. This script will determine the relative humidity from the entered dry and wet bulb temperatures data. Construction different materials react differently to different humidities so this temperature is needed when designing a building in different climates.

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. Enter a temperature relative humidity and actual station pressure. The entry required is in fahrenheit degrees. 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.

Dewpoint is the atmospheric temperature below which water droplets begin to condense and become dew. When the psychrometer is swung around by its attached chain or handle the air causes the water on the wick to evaporate which. Relative humidity dewpoint temp c. Enter your actual station pressure not the altimeter setting.

Dry bulb temperature t db can be measured with a simple thermometer as shown above. Dry bulb temperature and. Altitude above sea level m.