Speed convert.conversions
18 conversions speed units supported.
Popular Speed Conversions
Kilometer/Hour to Mile/Hourkm/h -> mph
Mile/Hour to Kilometer/Hourmph -> km/h
Meter/Second to Kilometer/Hourm/s -> km/h
Kilometer/Hour to Meter/Secondkm/h -> m/s
Knot to Kilometer/Hourkn -> km/h
Knot to Mile/Hourkn -> mph
Mach (at sea level) to Kilometer/HourMa -> km/h
Mach (at sea level) to Mile/HourMa -> mph
Foot/Second to Mile/Hourft/s -> mph
Meter/Second to Mile/Hourm/s -> mph
Speed of Light to Kilometer/Hourc -> km/h
All Speed Units
Click any conversion below to open the dedicated calculator with detailed formulas, conversion tables, and common values.
Meter/Second -> Kilometer/HourMeter/Second -> Mile/HourMeter/Second -> KnotMeter/Second -> Foot/SecondMeter/Second -> Foot/MinuteMeter/Second -> Centimeter/SecondMeter/Second -> Millimeter/SecondMeter/Second -> Mach (at sea level)Meter/Second -> Speed of LightMeter/Second -> Speed of SoundMeter/Second -> Kilometer/MinuteMeter/Second -> Kilometer/SecondMeter/Second -> Meter/MinuteMeter/Second -> Mile/MinuteMeter/Second -> Mile/SecondMeter/Second -> Yard/SecondMeter/Second -> Inch/SecondKilometer/Hour -> Meter/SecondKilometer/Hour -> Mile/HourKilometer/Hour -> KnotKilometer/Hour -> Foot/SecondKilometer/Hour -> Foot/MinuteKilometer/Hour -> Centimeter/SecondKilometer/Hour -> Millimeter/SecondKilometer/Hour -> Mach (at sea level)Kilometer/Hour -> Speed of LightKilometer/Hour -> Speed of SoundKilometer/Hour -> Kilometer/MinuteKilometer/Hour -> Kilometer/SecondKilometer/Hour -> Meter/MinuteKilometer/Hour -> Mile/MinuteKilometer/Hour -> Mile/SecondKilometer/Hour -> Yard/SecondKilometer/Hour -> Inch/SecondMile/Hour -> Meter/SecondMile/Hour -> Kilometer/HourMile/Hour -> KnotMile/Hour -> Foot/SecondMile/Hour -> Foot/MinuteMile/Hour -> Centimeter/SecondMile/Hour -> Millimeter/SecondMile/Hour -> Mach (at sea level)Mile/Hour -> Speed of LightMile/Hour -> Speed of SoundMile/Hour -> Kilometer/MinuteMile/Hour -> Kilometer/SecondMile/Hour -> Meter/MinuteMile/Hour -> Mile/MinuteMile/Hour -> Mile/SecondMile/Hour -> Yard/SecondMile/Hour -> Inch/SecondKnot -> Meter/SecondKnot -> Kilometer/HourKnot -> Mile/HourKnot -> Foot/SecondKnot -> Foot/MinuteKnot -> Centimeter/SecondKnot -> Millimeter/SecondKnot -> Mach (at sea level)Knot -> Speed of LightKnot -> Speed of SoundKnot -> Kilometer/MinuteKnot -> Kilometer/SecondKnot -> Meter/MinuteKnot -> Mile/MinuteKnot -> Mile/SecondKnot -> Yard/SecondKnot -> Inch/SecondFoot/Second -> Meter/SecondFoot/Second -> Kilometer/HourFoot/Second -> Mile/HourFoot/Second -> KnotFoot/Second -> Foot/MinuteFoot/Second -> Centimeter/SecondFoot/Second -> Millimeter/SecondFoot/Second -> Mach (at sea level)Foot/Second -> Speed of LightFoot/Second -> Speed of SoundFoot/Second -> Kilometer/MinuteFoot/Second -> Kilometer/SecondFoot/Second -> Meter/MinuteFoot/Second -> Mile/MinuteFoot/Second -> Mile/SecondFoot/Second -> Yard/SecondFoot/Second -> Inch/SecondFoot/Minute -> Meter/SecondFoot/Minute -> Kilometer/HourFoot/Minute -> Mile/HourFoot/Minute -> KnotFoot/Minute -> Foot/SecondFoot/Minute -> Centimeter/SecondFoot/Minute -> Millimeter/SecondFoot/Minute -> Mach (at sea level)Foot/Minute -> Speed of LightFoot/Minute -> Speed of SoundFoot/Minute -> Kilometer/MinuteFoot/Minute -> Kilometer/SecondFoot/Minute -> Meter/MinuteFoot/Minute -> Mile/MinuteFoot/Minute -> Mile/SecondFoot/Minute -> Yard/SecondFoot/Minute -> Inch/SecondCentimeter/Second -> Meter/SecondCentimeter/Second -> Kilometer/HourCentimeter/Second -> Mile/HourCentimeter/Second -> KnotCentimeter/Second -> Foot/SecondCentimeter/Second -> Foot/MinuteCentimeter/Second -> Millimeter/SecondCentimeter/Second -> Mach (at sea level)Centimeter/Second -> Speed of LightCentimeter/Second -> Speed of SoundCentimeter/Second -> Kilometer/MinuteCentimeter/Second -> Kilometer/SecondCentimeter/Second -> Meter/MinuteCentimeter/Second -> Mile/MinuteCentimeter/Second -> Mile/SecondCentimeter/Second -> Yard/SecondCentimeter/Second -> Inch/SecondMillimeter/Second -> Meter/SecondMillimeter/Second -> Kilometer/HourMillimeter/Second -> Mile/HourMillimeter/Second -> KnotMillimeter/Second -> Foot/SecondMillimeter/Second -> Foot/MinuteMillimeter/Second -> Centimeter/SecondMillimeter/Second -> Mach (at sea level)Millimeter/Second -> Speed of LightMillimeter/Second -> Speed of SoundMillimeter/Second -> Kilometer/MinuteMillimeter/Second -> Kilometer/SecondMillimeter/Second -> Meter/MinuteMillimeter/Second -> Mile/MinuteMillimeter/Second -> Mile/SecondMillimeter/Second -> Yard/SecondMillimeter/Second -> Inch/SecondMach (at sea level) -> Meter/SecondMach (at sea level) -> Kilometer/HourMach (at sea level) -> Mile/HourMach (at sea level) -> KnotMach (at sea level) -> Foot/SecondMach (at sea level) -> Foot/MinuteMach (at sea level) -> Centimeter/SecondMach (at sea level) -> Millimeter/SecondMach (at sea level) -> Speed of LightMach (at sea level) -> Speed of SoundMach (at sea level) -> Kilometer/MinuteMach (at sea level) -> Kilometer/SecondMach (at sea level) -> Meter/MinuteMach (at sea level) -> Mile/MinuteMach (at sea level) -> Mile/SecondMach (at sea level) -> Yard/SecondMach (at sea level) -> Inch/SecondSpeed of Light -> Meter/SecondSpeed of Light -> Kilometer/HourSpeed of Light -> Mile/HourSpeed of Light -> KnotSpeed of Light -> Foot/SecondSpeed of Light -> Foot/MinuteSpeed of Light -> Centimeter/SecondSpeed of Light -> Millimeter/SecondSpeed of Light -> Mach (at sea level)Speed of Light -> Speed of SoundSpeed of Light -> Kilometer/MinuteSpeed of Light -> Kilometer/SecondSpeed of Light -> Meter/MinuteSpeed of Light -> Mile/MinuteSpeed of Light -> Mile/SecondSpeed of Light -> Yard/SecondSpeed of Light -> Inch/SecondSpeed of Sound -> Meter/SecondSpeed of Sound -> Kilometer/HourSpeed of Sound -> Mile/HourSpeed of Sound -> KnotSpeed of Sound -> Foot/SecondSpeed of Sound -> Foot/MinuteSpeed of Sound -> Centimeter/SecondSpeed of Sound -> Millimeter/SecondSpeed of Sound -> Mach (at sea level)Speed of Sound -> Speed of LightSpeed of Sound -> Kilometer/MinuteSpeed of Sound -> Kilometer/SecondSpeed of Sound -> Meter/MinuteSpeed of Sound -> Mile/MinuteSpeed of Sound -> Mile/SecondSpeed of Sound -> Yard/SecondSpeed of Sound -> Inch/SecondKilometer/Minute -> Meter/SecondKilometer/Minute -> Kilometer/HourKilometer/Minute -> Mile/HourKilometer/Minute -> KnotKilometer/Minute -> Foot/SecondKilometer/Minute -> Foot/MinuteKilometer/Minute -> Centimeter/SecondKilometer/Minute -> Millimeter/SecondKilometer/Minute -> Mach (at sea level)Kilometer/Minute -> Speed of LightKilometer/Minute -> Speed of SoundKilometer/Minute -> Kilometer/SecondKilometer/Minute -> Meter/MinuteKilometer/Minute -> Mile/MinuteKilometer/Minute -> Mile/SecondKilometer/Minute -> Yard/SecondKilometer/Minute -> Inch/SecondKilometer/Second -> Meter/SecondKilometer/Second -> Kilometer/HourKilometer/Second -> Mile/HourKilometer/Second -> KnotKilometer/Second -> Foot/SecondKilometer/Second -> Foot/MinuteKilometer/Second -> Centimeter/SecondKilometer/Second -> Millimeter/SecondKilometer/Second -> Mach (at sea level)Kilometer/Second -> Speed of LightKilometer/Second -> Speed of SoundKilometer/Second -> Kilometer/MinuteKilometer/Second -> Meter/MinuteKilometer/Second -> Mile/MinuteKilometer/Second -> Mile/SecondKilometer/Second -> Yard/SecondKilometer/Second -> Inch/SecondMeter/Minute -> Meter/SecondMeter/Minute -> Kilometer/HourMeter/Minute -> Mile/HourMeter/Minute -> KnotMeter/Minute -> Foot/SecondMeter/Minute -> Foot/MinuteMeter/Minute -> Centimeter/SecondMeter/Minute -> Millimeter/SecondMeter/Minute -> Mach (at sea level)Meter/Minute -> Speed of LightMeter/Minute -> Speed of SoundMeter/Minute -> Kilometer/MinuteMeter/Minute -> Kilometer/SecondMeter/Minute -> Mile/MinuteMeter/Minute -> Mile/SecondMeter/Minute -> Yard/SecondMeter/Minute -> Inch/SecondMile/Minute -> Meter/SecondMile/Minute -> Kilometer/HourMile/Minute -> Mile/HourMile/Minute -> KnotMile/Minute -> Foot/SecondMile/Minute -> Foot/MinuteMile/Minute -> Centimeter/SecondMile/Minute -> Millimeter/SecondMile/Minute -> Mach (at sea level)Mile/Minute -> Speed of LightMile/Minute -> Speed of SoundMile/Minute -> Kilometer/MinuteMile/Minute -> Kilometer/SecondMile/Minute -> Meter/MinuteMile/Minute -> Mile/SecondMile/Minute -> Yard/SecondMile/Minute -> Inch/SecondMile/Second -> Meter/SecondMile/Second -> Kilometer/HourMile/Second -> Mile/HourMile/Second -> KnotMile/Second -> Foot/SecondMile/Second -> Foot/MinuteMile/Second -> Centimeter/SecondMile/Second -> Millimeter/SecondMile/Second -> Mach (at sea level)Mile/Second -> Speed of LightMile/Second -> Speed of SoundMile/Second -> Kilometer/MinuteMile/Second -> Kilometer/SecondMile/Second -> Meter/MinuteMile/Second -> Mile/MinuteMile/Second -> Yard/SecondMile/Second -> Inch/SecondYard/Second -> Meter/SecondYard/Second -> Kilometer/HourYard/Second -> Mile/HourYard/Second -> KnotYard/Second -> Foot/SecondYard/Second -> Foot/MinuteYard/Second -> Centimeter/SecondYard/Second -> Millimeter/SecondYard/Second -> Mach (at sea level)Yard/Second -> Speed of LightYard/Second -> Speed of SoundYard/Second -> Kilometer/MinuteYard/Second -> Kilometer/SecondYard/Second -> Meter/MinuteYard/Second -> Mile/MinuteYard/Second -> Mile/SecondYard/Second -> Inch/SecondInch/Second -> Meter/SecondInch/Second -> Kilometer/HourInch/Second -> Mile/HourInch/Second -> KnotInch/Second -> Foot/SecondInch/Second -> Foot/MinuteInch/Second -> Centimeter/SecondInch/Second -> Millimeter/SecondInch/Second -> Mach (at sea level)Inch/Second -> Speed of LightInch/Second -> Speed of SoundInch/Second -> Kilometer/MinuteInch/Second -> Kilometer/SecondInch/Second -> Meter/MinuteInch/Second -> Mile/MinuteInch/Second -> Mile/SecondInch/Second -> Yard/Second
About speed units
This category covers 18 speed units and every ordered conversion between them, which is 306 dedicated pages in total. The units included here are Meter/Second (m/s), Kilometer/Hour (km/h), Mile/Hour (mph), Knot (kn), Foot/Second (ft/s), Foot/Minute (ft/min), Centimeter/Second (cm/s), Millimeter/Second (mm/s), Mach (at sea level) (Ma), Speed of Light (c), Speed of Sound (sound), Kilometer/Minute (km/min), Kilometer/Second (km/s), Meter/Minute (m/min), Mile/Minute (mi/min), Mile/Second (mi/s), Yard/Second (yd/s), Inch/Second (in/s). Each unit is defined against a single canonical reference for the category, so a conversion between any two of them is carried out as two exact steps: the input value is first expressed in the reference unit, then re-expressed in the target unit. Routing every pair through one reference rather than storing a factor for each combination keeps the whole category internally consistent and means a correction to one definition propagates everywhere it is used.
Precision and rounding
Conversions are computed in double-precision floating point and displayed at the precision you choose, so the value shown is a rounded view of a more exact internal result rather than the result itself. Where a factor is defined exactly by treaty or standard, the arithmetic is exact to the limits of the representation; where a factor derives from a measured physical quantity, the trailing digits carry the uncertainty of the underlying measurement. For engineering and scientific work, carry the full precision through intermediate steps and round only the final figure, since rounding at each stage of a multi-step calculation accumulates error.
How to use this page
Pick any pair above to open its dedicated converter, which shows the formula, the exact factor, a table of common values and the source the definition is taken from. The search box filters the pair list by unit name or symbol, which is the quickest route when a category carries many closely named units. Every conversion is calculated in your browser, so pages continue to work offline once visited and no input value is ever sent to a server.