Calculate the actual speed of an aircraft through the air, corrected for altitude and temperature.
Input Parameters
Calculation Results
Enter parameters to calculate
Quick Reference
CASCalibrated Airspeed
AltitudePressure Altitude
OATOutside Air Temperature
Overview
True Airspeed (TAS) is the speed of the aircraft relative to the airmass in which it is flying. It is the actual speed of the aircraft after correcting for errors and density changes.
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Pro Tips
TAS increases with altitude because the air is less dense.
A rule of thumb is that TAS increases about 2% for every 1000 feet of altitude.
The formula used here accounts for density altitude more accurately.
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Fun Facts
"The Pitot tube only measures 'Impact Pressure', which is why we need to correct it to get TAS."
"High-altitude jets can have a massive difference between their indicated airspeed and their true airspeed."
"Supersonic flight is defined by Mach number, which is the ratio of TAS to the local speed of sound."
