🌦️ Psychrometrics & Atmospheric Physics
Dew Point & Humidity Calculator
Calculate dew point temperature ($T_{dp}$) using the Magnus-Tetens formula and evaluate human thermal comfort and condensation risk.
Atmospheric Conditions
%
Calculated Dew Point Temperature
17.9 °C (64.2 °F)
Vapor Pressure
2.06 kPa
Absolute Humidity
15.0 g/m³
Condensation Temp
17.9 °C
💡 Human Thermal Perception:
Dew points above 16°C (60°F) feel noticeably humid, while dew points exceeding 21°C (70°F) feel tropical and oppressive.
The Magnus-Tetens Equation
The Magnus formula computes dew point ($T_{dp}$) from temperature ($T$ in °C) and relative humidity ($RH$ in %):
$$\gamma(T, RH) = \frac{a \cdot T}{b + T} + \ln(RH / 100), \quad T_{dp} = \frac{b \cdot \gamma}{a - \gamma}$$
Where standard constants are $a = 17.27$ and $b = 237.7^\circ\text{C}$.