Wet Bulb Temperature Calculator - Free Online Tool

The wet bulb temperature (WBT) measures the cooling effect of evaporating water into the air. It is calculated using three key measurements: the dry bulb temperature (ambient air temp), the dew point, and the relative humidity. Our calculator uses these inputs to estimate how much the air will cool if it were saturated with water.

Essentially, we model the energy exchange that occurs when sweat evaporates from your skin or when water is sprayed into humid air. The lower the WBT compared to the dry bulb temperature, the faster and more effective the cooling process is, indicating high humidity.

• Dry Bulb Temperature: The actual air temperature.
• Dew Point: The temperature at which water vapor will condense.
• Wet Bulb Temperature: The theoretical minimum temperature the air can reach through evaporative cooling.

For maximum accuracy, ensure the inputs (dry bulb temperature, dew point, and relative humidity) come from reliable, recent meteorological sources. Local weather stations are ideal.

• Field Use: If you are measuring WBT in a specific confined area (like a poorly ventilated warehouse), take multiple readings to account for localized air pockets.
• Comparing Locations: When comparing two locations, always note the latitude and altitude, as these factors can subtly influence atmospheric pressure and thus the calculated wet bulb value.
• Remember: This tool provides a theoretical calculation; actual human comfort depends on physical activity level and individual health status.