Calculator. Engineer tool for calculation of air parameters for an International Standard Atmosphere. ISO 2533. The following parameters are available: - Altitude - Mach Number - True Airspeed - Delta T from ISA - Static Temperature - Total Temperature - Static Pressure - Total Pressure You can choose any combination of three parameters. Different units are available. It is also possible to calculate the Gas Properties: - Specific Heat - Gas Constant - Isentropic Exponent