Knots to Speed of Sound Converter

Convert knots to multiples of the speed of sound and back instantly. Bidirectional speed converter.

How to Convert Knots to Speed of Sound

To convert knots to multiples of the speed of sound, divide by 666.739. The speed of sound equals about 667 knots at sea level.

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Knots to KM/H Converter

Convert knots to kilometers per hour and km/h to knots for nautical speed.

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Convert meters per second to kilometers per hour and km/h to m/s.

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Convert feet per second to meters per second and m/s to ft/s.

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What is the speed of sound in knots?

At standard sea-level conditions, the speed of sound is approximately 666.739 knots.

Is this the same as converting to Mach?

Essentially yes. Mach 1 equals the speed of sound, so the conversion factor is the same.

What is supersonic speed in knots?

Any speed above 666.739 knots (at sea level) is supersonic.

What is the Concorde cruising speed in knots?

The Concorde cruised at about 1,154 knots, or roughly Mach 2.04.