Speed Unit Converter

Convert between 7 speed units instantly - km/h, mph, m/s, knots and more

Convert to All Units

Kilometer/hour (km/h)-
Mile/hour (mph)-
Meter/second (m/s)-
Foot/second (ft/s)-
Knot (kn)-
Mach (Ma)-
Speed of Light (c)-

Speed Units Reference

Unit Symbol In m/s Common Use
Kilometer/hour km/h 0.2778 Car speedometers (most countries), weather reports
Mile/hour mph 0.4470 Car speedometers (US, UK), baseball pitch speed
Meter/second m/s 1 Scientific measurements, physics calculations
Foot/second ft/s 0.3048 Bullet velocity, engineering (US)
Knot kn 0.5144 Maritime & aviation speed, wind speed
Mach Ma 343 Aircraft speed, supersonic jets
Speed of Light c 299,792,458 Astronomy, relativistic physics

Popular Speed Conversions

KM/H MPH MPH KM/H M/S KM/H KM/H M/S Knots KM/H KM/H Knots Knots MPH MPH Knots M/S MPH MPH M/S FT/S M/S M/S FT/S KM/H FT/S FT/S KM/H Mach KM/H KM/H Mach