Unit of Measure Conversions

Velocity (speed) Conversions

INPUT value:

OUTPUT values

Messages:

| |

Name	Symbol	Value	Description/Notes
knot	kn; kt	1,852 metres/hour	International nautical mile per hour
Mach number	M; Ma		Ratio of the speed of an object in a medium to the speed of sound in that medium
	c	2.99792458 x 10⁸ metres/second; 186,282 miles/second	Speed of light
		331.3 metres/second	Speed of sound in dry (0% humidity) air at 0°C
		343.3 metres/second	Speed of sound in dry air at 20°C

Approximation	% Accuracy
60 miles/hour ≈ 100 kilometres/hour	96.6
1 knot ≈ ½ metre/second	97.2
1 knot ≈ 100 feet/minute	98.7
Speed of light ≈ 3 x 10⁸ metres/second	99.9