Psychrometric Chart Calculator Excel May 2026

=0.62198 * B6 / (B2 - B6) Cell B8:

=B5 * (B4/100) Cell B7:

[ p_ws = 0.61094 \cdot \exp\left( \frac17.625 \cdot T_dbT_db + 243.04 \right) ] where ( T_db ) is in °C, result in kPa. 1. Humidity ratio from vapor pressure psychrometric chart calculator excel