Aerodynamic Mach Number & Speed of Sound by Altitude Calculator
Calculate flight Mach number (M = TAS / a), speed of sound in km/h, knots, and m/s across international standard atmosphere (ISA) altitudes, and determine flight aerodynamic regimes.
Calculator Inputs
Live Real-TimeFlight Mach Number (M)
Speed of Sound (km/h)
1,067.69 km/h
Speed of Sound in Knots (KTAS)
576.51 knots
Ambient Air Temperature (°C)
-54.34 °C
Transonic Jet Velocity: Aircraft operating within high-efficiency commercial jet cruise regime.
Mach Flight Profile
Detailed Calculation Breakdown
Calculation Methodology
Speed of sound: a = √(γ * R * T) = 20.05 * √T_Kelvin. Mach Number: M = TAS / a. At sea level (15°C), a = 1225 km/h; at 35,000 ft (-54.3°C), a = 1062 km/h.
Important Legal & Educational Disclaimer
This aerospace aerodynamics tool models International Standard Atmosphere (ISA) gas dynamics.
This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.
Frequently Asked Questions
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