Kilometers per Hour to Speed of Sound Converter

Convert velocity from kilometers per hour (km/h) to speed of sound (Mach)

≈ 0.28 Mach

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Understanding Speed of Sound Conversion

What is Speed of Sound (Mach)?

The speed of sound, often measured in Mach numbers, is approximately 1,235 kilometers per hour (767 mph) at sea level and 20°C (68°F). One Mach equals this speed.

Conversion Formula

To convert kilometers per hour to Mach number:

Mach = km/h ÷ 1,235

Common Speed Comparisons

  • Typical passenger aircraft: 800 km/h (≈ 0.65 Mach)
  • Commercial airliner cruising speed: 900 km/h (≈ 0.73 Mach)
  • Speed of sound (Mach 1): 1,235 km/h
  • Supersonic fighter jet: 2,470 km/h (Mach 2)