Convert Mile per Hour to Foot per Second (mph → ft/s)
Miles per hour is the road-speed standard in the United States, the United Kingdom, and several Caribbean countries.
Mile per Hour to Foot per Second Conversion Table
10 common values| Mile per Hour | Foot per Second |
|---|---|
| 1 mph | 1.466667 ft/s |
| 5 mph | 7.333333 ft/s |
| 10 mph | 14.666667 ft/s |
| 25 mph | 36.666667 ft/s |
| 50 mph | 73.333333 ft/s |
| 100 mph | 146.66667 ft/s |
| 150 mph | 220 ft/s |
| 200 mph | 293.33333 ft/s |
| 300 mph | 440 ft/s |
| 500 mph | 733.33333 ft/s |
How to Convert Mile per Hour to Foot per Second Manually
Step by StepConverting miles per hour to feet per second is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.
- 1Take your value in miles per hourStart with the number of miles per hour (mph) you want to convert.
- 2Multiply by 1.466667The conversion factor from mph to ft/s is 1.466667. Multiply your value by this number.
- 3Read the result in feet per secondThe result is your value in feet per second (ft/s).
Formula
Multiply the value in miles per hour by 1.466667. For the reverse direction, multiply by 0.681818.
ft/s = mph × 1.466667mph = ft/s × 0.681818Tips
Use these in everyday conversions- 1 mph = 1.609 km/h = 0.447 m/s.
- Quick convert: mph × 1.6 = km/h.
- UK speeds posted in mph on road signs despite general metrication.
Common Mistakes
Avoid these- Reading a UK road sign "50" as km/h — it's mph (= 80 km/h).
- Converting mph to km/h by multiplying by 1.5 instead of 1.609 — 7% error.
- Assuming "mph" and "MPH" differ — capitalisation does not matter.
About Mile per Hour and Foot per Second
What is the Mile per Hour?
Miles per hour is the road-speed standard in the United States, the United Kingdom, and several Caribbean countries. American and British road signs, car speedometers, and weather reports use mph. Typical US speed limits are 25 mph (residential), 35–45 mph (urban arterials), 55–65 mph (rural highways), and 65–80 mph (interstates). The UK uses mph despite metric measurement elsewhere — a result of incomplete metrication. Mph derives from the mile (distance) and hour (time): 1 mph ≈ 1.609 km/h ≈ 0.447 m/s. World-class sprinters reach about 27 mph, professional baseball pitchers throw at 90–105 mph, and commercial airliners cruise at 550–600 mph. The unit relates to km/h (1 mph ≈ 1.609 km/h), m/s (1 mph ≈ 0.447 m/s), the knot (1 mph ≈ 0.869 kn), and ft/s (1 mph ≈ 1.467 fps).
- US and UK road speed limits
- US car speedometers
- US baseball pitch speeds
US interstate: 70 mph typical. UK motorway: 70 mph limit. Cycling pro speed: 25 mph. Tornado winds: 110+ mph.
What is the Foot per Second?
Feet per second is the standard ballistics unit for projectile speeds, American sports analytics, and engineering. Bullet velocities are universally given in fps: a .22 LR bullet flies at about 1,200 fps, a 9 mm pistol round at 1,150 fps, and a high-velocity rifle round at 3,000 fps. American football and baseball analytics increasingly use fps for measuring throwing speed, ball exit velocity, and player movement. Engineering disciplines that retain US customary units (HVAC, civil engineering) often specify air or water flow speeds in fps. The unit relates to mph (1.467 fps = 1 mph), m/s (1 fps ≈ 0.305 m/s), and the knot (1 fps ≈ 0.592 kn). Outside ballistics and US sports, m/s and km/h dominate — but in their domains, fps remains entrenched in American technical practice.
- US ballistics and firearms
- US civil-engineering flow rates
- Older US physics and engineering texts
9mm bullet muzzle velocity: ~1150 ft/s. .308 rifle: ~2700 ft/s. Free fall terminal velocity: ~195 ft/s.