Miles per Hour (mph)
Miles per hour measure speed as miles traveled in one hour. One mile equals 1,609.344 meters, so 1 mph equals approximately 0.44704 meters per second [bipm-si-brochure]. This unit is widely used for vehicle speed and speed limits in non-metric countries.
Origin
Miles per hour originated from the mile and hour units standardized in the British Imperial system. It became common in transportation with the rise of automobiles and was internationally recognized with the mile's 1959 definition [bipm-si-brochure].
Worldwide Use
The USA, United Kingdom, and several Commonwealth nations use mph for road speed limits and vehicle speeds. It remains standard in aviation and motorsports within these countries, despite metrication efforts [nist-sp-811].
Common References
- Typical city driving speed (~30 mph)
- Maximum speed limit on many US highways (~65 mph)
- Speed of a fast cycling athlete (~25 mph)
- Cruising speed of some small aircraft (~120 mph)
Miles per Hour → Meters per Second1 mph = 0.447 m/sMiles per Hour → Kilometers per Hour1 mph = 1.6093 km/hMiles per Hour → Feet per Second1 mph = 1.4667 ft/sMiles per Hour → Knots1 mph = 0.869 knMiles per Hour → Speed of Light1 mph = 0 cMiles per Hour → Speed of Sound1 mph = 0.0013 MachMiles per Hour → Centimeters per Second1 mph = 44.704 cm/sMiles per Hour → Millimeters per Second1 mph = 447.04 mm/sMiles per Hour → Inches per Second1 mph = 17.6 in/sMiles per Hour → Yards per Second1 mph = 0.4889 yd/sMiles per Hour → Kilometers per Second1 mph = 0.0004 km/sMiles per Hour → Miles per Second1 mph = 0.0003 mi/sMiles per Hour → Meters per Minute1 mph = 26.8224 m/minMiles per Hour → Kilometers per Minute1 mph = 0.0268 km/minMiles per Hour → Miles per Minute1 mph = 0.0167 mi/minMiles per Hour → Feet per Minute1 mph = 88 ft/minMiles per Hour → Inches per Minute1 mph = 1,056 in/minMiles per Hour → Yards per Minute1 mph = 29.3333 yd/minMiles per Hour → Meters per Hour1 mph = 1,609.344 m/hMiles per Hour → Miles per Day1 mph = 24 mi/dMiles per Hour → Kilometers per Day1 mph = 38.6243 km/dMiles per Hour → Nautical Miles per Hour1 mph = 0.869 nmi/hMiles per Hour → Furlongs per Fortnight1 mph = 2,688 fur/fnMiles per Hour → First Cosmic Velocity1 mph = 0.0001 v1Miles per Hour → Second Cosmic Velocity1 mph = 0 v2Miles per Hour → Third Cosmic Velocity1 mph = 0 v3Miles per Hour → Earth1 mph = 0 v⊕Miles per Hour → Speed of Sound in Water1 mph = 0.0003 swMiles per Hour → Mach (Sea Level)1 mph = 0.0013 MaMiles per Hour → Beaufort 1 (Light Air)1 mph = 0.5588 Bft 1Miles per Hour → Beaufort 6 (Strong Breeze)1 mph = 0.0363 Bft 6Miles per Hour → Beaufort 12 (Hurricane)1 mph = 0.0137 Bft 12Miles per Hour → Leagues per Hour1 mph = 0.0003 lea/hMiles per Hour → Dekameters per Second1 mph = 0.0447 dam/sMiles per Hour → Hectometers per Second1 mph = 0.0045 hm/sMiles per Hour → Megameters per Second1 mph = 0 Mm/sMiles per Hour → Gigameters per Second1 mph = 0 Gm/sMiles per Hour → Terameters per Second1 mph = 0 Tm/s