The International Standard Atmosphere (ISO 2533 issued in 1975) provides the following information for a given altitude:
Temperature
Pressure
Velocity of sound
Density
Viscosity
ISO 2533 is identical to US Standard Atmosphere 1962 and 1976, This ISO Standard is also stated to be identical with the ICAO (International Civil Aviation Organization) and WMO (World Meteorological Organization) Standard Atmospheres.

Features

• International Standard Atmosphere (Example calculation)
  Inputs :
  Altitude 0.0 m 0.0 ft
  Velocity 1 m/s 3.2808 ft/s
  Ref. Length 1 m 3.2808 ft
  
  Results :
  Temperature 15.0 °C
  Density 1.225 kg/m³
  Pressure 1013.25 mbar (hPa)
  Speed of Sound 1225.05768732 km/h
  Viscosity 0.000017893796605 N s/m²
  Mach Number 0.00293864
  Dynamic Pressure 0.00612501 mbar (hPa)
  Critical Cp -78035.05523482
  Vacuum Cp -165428.38814747
  Reynolds Number 68459.47939444
  Laminar Cf 0.00507553
  Turbulent Cf 0.00780132
• Results
• Results can be copied to the Clipboard
• Print results

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