Psychrometric Calculator

Uses the same Magnus-type saturation pressure as the dew point tool, then humidity ratio W = 0.621945·P_w/(P−P_w) and h = 1.006·T + W·(2501 + 1.86·T) per kg dry air. Fixed total pressure; no wet-bulb or mixing sections.

Free · No limits · Runs in your browser

How to use

  1. 1Enter dry-bulb °C and RH (0–100%, exclusive 0).
  2. 2Set barometric pressure (default sea-level) within the allowed band.
  3. 3Review dew point, W, and approximate enthalpy.

Frequently asked questions

Can I enter wet-bulb?
Not in this phase — use dry-bulb and RH, or pair with other tools that supply RH.
Is moist-air density used here?
No. W and h use the standard approximate formulas; density-based flows are separate.

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