[ Return to Functions List ]

Indicated Air Speed (IAS) calculator

Pressure Altitude:
OAT (Outside Air Temp.):

How IAS (Indicated Air Speed) is calculated

To compute IAS (Indicated Air Speed) from TAS (True Air Speed), Pressure Altitude (air density) and temperature are considered. To this end, first a correction to the TAS for the air density/pressure is applied, then a correction for temperature is applied based on the difference between the OAT (Outside Air Temperature) and the ISA temperature at the given altitude.

Note: this calculator is not suitable for supersonic speeds i.e. greater than the speed of sound.

   Copyright © 1998-2023 Dr. Jamie Alnasir. All Rights Reserved. Terms of Use