Mass Flow Application Air Mass Flow Calculation Atmospheric Pressure Atmospheric Pressure Unit PSI inH20 inHg mmHg Static Pressure Static Pressure Unit PSI inH20 inHg mmHg Differential Pressure Differential Pressure Unit PSI inH20 inHg mmHg Temperature Temperature Unit °F °C Mass Flow: Air Density: Volumetric Flow: Slide valve position to simulate aircraft resistance to flow: Effective Area: Valve Position: