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Graph Builder

Data & Settings

Enter dry-bulb and wet-bulb temperatures (°C). Pressure defaults to 101.325 kPa but you can change it.

Tetens formula is used for saturation vapor pressure: Pws = 0.6108 · exp(17.27·T / (T+237.3)).
Psychrometric constant γ = 0.00066 · P (kPa/°C). Humidity ratio ω = 0.622·Pw / (P - Pw).

Graph Interaction Controls

Data Label Controls

Show Data Labels (All Points)