Grains of Moisture Calculator

Calculate grains of moisture per pound of dry air. Commonly used in dehumidification and humidity control applications.

Measured air temperature.
°F
Relative humidity percentage.
%
Atmospheric pressure (standard = 14.696).
psia

Results

Grains of Moisture-grains/lb
Humidity Ratio-lb/lb
Vapor Pressure-psia
Saturation Grains-grains/lb
References: ASHRAE Fundamentals Chapter 1: Psychrometrics