Speed of Sound to Knots Converter

Convert speed of sound (Mach) to knots with our free calculator

666.74 kn
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Understanding Speed of Sound Conversion

The speed of sound, also known as Mach 1, is a crucial measurement in aviation and aerodynamics. At sea level and standard atmospheric conditions (20°C), one unit of speed of sound equals:

  • 666.74 knots
  • 767 miles per hour
  • 343 meters per second

Formula Used

To convert from speed of sound (Mach) to knots, use the following formula:

Knots = Speed of Sound × 666.738661