Psychrometric Chart Calculator Excel ★ Original

While printed charts are useful for quick look‑ups, they suffer from low precision, interpolation errors, and inconvenience in iterative calculations. An solves these problems by embedding the governing equations directly into a spreadsheet, allowing rapid, accurate, and repeatable analysis.

Introduction Psychrometrics—the study of the thermodynamic properties of moist air—is fundamental to HVAC design, building science, agricultural storage, and industrial drying processes. The standard tool for visualizing these relationships is the psychrometric chart, a complex graph with dry-bulb temperature on the x‑axis and humidity ratio on the y‑axis, overlaid with curves for relative humidity, wet‑bulb temperature, specific volume, and enthalpy. psychrometric chart calculator excel

=0.61094*EXP(17.625*B3/(B3+243.04)) Cell B6: While printed charts are useful for quick look‑ups,

=1.006*B3 + B7*(2501 + 1.86*B3) Cell B9: they suffer from low precision