True Airspeed (TAS) Calculator
Calculate true airspeed from indicated airspeed, pressure altitude, and outside air temperature. Essential for flight planning and navigation.
Inputs
kt
Light aircraft cruise: 90–180 kt
ft
VFR cruise: 3,000–12,000 ft
°C
At 8,000 ft ISA: ~1°C
Results
True Airspeed (TAS)
136 kt
Mach Number0.21
Speed of Sound644 kt
Density Ratio (σ)0.7836
ISA Deviation1°C
True Airspeed (TAS)
136 kt
How to Use This Calculator
- Read your indicated airspeed (IAS) from the airspeed indicator.
- Enter your pressure altitude (set altimeter to 29.92 inHg and read altitude).
- Enter the outside air temperature (OAT) in Celsius.
- Use the resulting TAS for wind triangle and flight planning calculations.
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Calculate heading, WCA, and ground speed from wind.
Heading & Course Converter
Convert between true, magnetic, and compass headings.
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