Speed Converter

Convert between m/s, km/h, mph, knots, fps, Mach, and the speed of light instantly.

Speed Converter

Value

From Unit

27.777778

m/sMeters per second

0.027777778

km/sKilometers per second

100

km/hKilometers per hour

62.137119

mphMiles per hour

91.134442

ft/sFeet per second

53.995727

knotKnot (nautical)

0.081629721

MachMach (sea level)

9.2657e-8

cSpeed of Light

Reference Speeds

Common Speed Units

Speed is measured differently around the world. km/h is standard in most countries; mph is used in the US and UK. Knots are used in aviation and maritime navigation. Mach numbers express speed relative to the speed of sound (~340 m/s at sea level).