✈️ True Airspeed Calculator
Calculate TAS from IAS, altitude, and temperature
True Airspeed
429 KTAS
494 MPH / 795 km/h
Mach Number
M 0.737
Speed of sound: 582 kts
Pressure Altitude
35000 ft
Density Altitude
35516 ft
ISA Temp @ Alt
-54.3°C
ISA Deviation
+4.3°C
📋 Quick Reference
IAS (Indicated Airspeed)
What the cockpit instrument shows, uncorrected
TAS (True Airspeed)
Actual speed through the air mass
Pressure Altitude
Altitude when altimeter is set to 29.92
Density Altitude
Pressure altitude corrected for non-standard temperature
📐 Formulas
TAS ≈ IAS × (1 + altitude/50000) × √(OAT_K / ISA_K)
Mach = TAS / Speed of Sound
Speed of Sound = 38.967 × √(Temperature in Kelvin)
Pressure Altitude = Indicated Altitude + ((29.92 - Altimeter) × 1000)