Convert Miles per hour to Feet per second
One mile per hour equals 1.466667 feet per second. Type any value to convert miles per hour to feet per second instantly — with a full reference table below.
Convert Miles per hour to Feet per second
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How to convert Miles per hour to Feet per second
To convert miles per hour to feet per second, multiply by 1.466667. One mile per hour equals 1.466667 ft/s, and one foot per second equals 0.681818 mph.
- Take the value in miles per hour — for example 7.5 mph.
- Multiply by 1.466667 (the number of feet per second in one mile per hour).
- 7.5 × 1.466667 = 11 ft/s.
Quick mental estimate: Multiply the number of miles per hour by 1.47 (within 0.2% of the exact answer).
Miles per hour to Feet per second conversion table
| Miles per hour | Feet per second |
|---|---|
| 1 mph | 1.466667 ft/s |
| 5 mph | 7.333333 ft/s |
| 10 mph | 14.66667 ft/s |
| 20 mph | 29.33333 ft/s |
| 25 mph | 36.66667 ft/s |
| 30 mph | 44 ft/s |
| 40 mph | 58.66667 ft/s |
| 50 mph | 73.33333 ft/s |
| 60 mph | 88 ft/s |
| 70 mph | 102.6667 ft/s |
| 80 mph | 117.3333 ft/s |
| 100 mph | 146.6667 ft/s |
| 120 mph | 176 ft/s |
| Feet per second | Miles per hour |
|---|---|
| 1 ft/s | 0.681818 mph |
| 5 ft/s | 3.409091 mph |
| 10 ft/s | 6.818182 mph |
| 20 ft/s | 13.63636 mph |
| 25 ft/s | 17.04545 mph |
| 30 ft/s | 20.45455 mph |
| 40 ft/s | 27.27273 mph |
| 50 ft/s | 34.09091 mph |
| 60 ft/s | 40.90909 mph |
| 70 ft/s | 47.72727 mph |
| 80 ft/s | 54.54545 mph |
| 100 ft/s | 68.18182 mph |
| 120 ft/s | 81.81818 mph |
About converting Miles per hour to Feet per second
Miles per hour (mph) and Feet per second (ft/s) are both units of speed. The exact factor is 1 mph = 1.466667 ft/s, so multiply by 1.466667 to go from miles per hour to feet per second (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Feet per second to Miles per hour converter, or the full unit converter for every unit at once.
Real-world speed in miles per hour and feet per second
| Example | Miles per hour | Feet per second |
|---|---|---|
| A walking pace | ≈ 3.131711 mph | ≈ 4.593176 ft/s |
| Usain Bolt's top speed (2009) | ≈ 27.78275 mph | ≈ 40.74803 ft/s |
| The UK motorway limit (70 mph) | 70 mph | 102.6667 ft/s |
| The German Autobahn advisory speed (130 km/h) | 80.77823 mph | 118.4747 ft/s |
| The speed of sound (air, 20 °C) | ≈ 767.2691 mph | ≈ 1,125.328 ft/s |
| An airliner at cruise | ≈ 559.2341 mph | ≈ 820.21 ft/s |
“≈” marks typical values; the rest are defined or measured figures.
The units
Miles per hour — exactly 0.44704 m/s.
Used for: Road speeds in the US and UK.
Feet per second — exactly 0.3048 m/s.
Used for: Ballistics, engineering and US sport analytics.
km/h, mph, ft/s and knots are all defined exactly in metres per second (a knot is one nautical mile, exactly 1,852 m, per hour).