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Why Use This Temperature Wet Bulb Calculator?

Wet Bulb Calculator

Wet Bulb Temperature
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Formulas and Methodology

1. Wet Bulb Calculation (Stull, 2011):

The full equation used for the calculation is displayed below. Note that atan represents the arctangent function, T is Air Temperature (°C), and RH is Relative Humidity (%):

Tw = T * atan[0.151977 * (RH + 8.313659)^0.5] + atan(T + RH) - atan(RH - 1.676331) + 0.00391838 * (RH)^1.5 * atan(0.023101 * RH) - 4.686035
2. Dew Point to Humidity Conversion:

Used when Dew Point is provided instead of Humidity (Alduchov & Eskridge, 1996):

RH = 100 * (EXP((17.625 * Td)/(243.04 + Td)) / EXP((17.625 * T)/(243.04 + T)))
Wet Bulb Calculator

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