ft/s to mph Converter

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Convert feet per second to miles per hour at the rate 1 ft/s ≈ 0.6818 mph (88 ft/s = 60 mph exactly). Common in US ballistics: a 1,200 ft/s muzzle velocity is about 818 mph; a 90 ft/s tennis serve is 61.36 mph. Useful when sport-radar or projectile readings in ft/s need to be expressed in mph. Browser-local.

Foot per second (ft/s)
Mile per hour (mph)

Foot per second (ft/s) → Mile per hour (mph)

Quick reference table

Foot per second (ft/s)Mile per hour (mph)
10 ft/s6.8182 mph
25 ft/s17.0455 mph
50 ft/s34.0909 mph
60 ft/s40.9091 mph
80 ft/s54.5455 mph
100 ft/s68.1818 mph
120 ft/s81.8182 mph
150 ft/s102.2727 mph
200 ft/s136.3636 mph

Glossary

Foot per second (ft/s)

A foot per second is an imperial speed unit used in US engineering — projectile ballistics, fluid mechanics and HVAC airflow specifications. 1 ft/s = 0.3048 m/s = 1.0973 km/h = 0.6818 mph. The speed of sound at sea level is about 1,125 ft/s; a fast pitcher's fastball reaches about 145 ft/s.

Mile per hour (mph)

A mile per hour is the customary speed unit used in the United States, the United Kingdom and a few other countries for road traffic, athletic events and weather reports. 1 mph = 1.6093 km/h = 0.4470 m/s. Typical US highway limits are 55–75 mph; a 100 m sprinter peaks at about 27 mph; a hurricane is sustained winds above 74 mph.

Metric / SI speed

In the metric system, speed is reported in meters per second (scientific) or kilometers per hour (everyday). The relation is exact: 1 m/s = 3.6 km/h. Most countries use km/h on road signs and speedometers; m/s appears in physics, engineering, weather data and athletics where fine-resolution timing matters.

Imperial / US Customary speed

In the United States, the United Kingdom and a few other countries, road speeds are reported in miles per hour (mph). US engineering also uses feet per second (ft/s). 1 mph = 1.6093 km/h = 0.4470 m/s. Maritime and aviation worldwide use knots (1 knot = 1.852 km/h), independent of the metric/imperial divide.

Related tools

mph to ft/s
Convert mph to ft/s — 60 mph = 88 ft/s exactly
ft/s to m/s
Convert ft/s to m/s — 1 ft/s = 0.3048 m/s
mph to km/h
Convert mph to km/h — 1 mph = 1.6093 km/h
Speed Converter
Convert speed — m/s, km/h, mph, knots, ft/s, mach