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Jamie's Aviation Flight Computer

Now available as an Android app on the Google Play Store

Indicated Air Speed (IAS) calculator

Pressure Altitude:
 
OAT (Outside Air Temp.):
TAS:
 
IAS:

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.


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