##### Air Density The density of air or atmospheric density, is the mass per unit volume of Earth's atmosphere. Air density, like air pressure, decreases with increasing [[altitude]]. It also changes with variation in [[atmospheric pressure]] , [[Temperature]] and [[humidity]]. At 101.325 kPa (abs) and 20 °C (68 °F), air has a density of approximately 1.204 kg/m3 (0.0752 lb/cu ft), according to the International Standard Atmosphere ([[ISA]]). >Covered in: >Mentioned in: >References: [[WP Density of Air|🌍]] >Required by: > >Related to: