Miles per Hour to Feet per Second Converter
Accurate mi/h to ft/s conversion with instant results and formulas
Quick Conversions
Conversion Formula
To convert miles per hour to feet per second, multiply the speed value by 1.466666667 (or 22/15).
To convert feet per second to miles per hour, multiply the speed value by 0.681818182 (or 15/22).
Conversion Examples
Example 1: Convert 25 mi/h to ft/s
- Start with the value: 25 mi/h
- Apply the conversion factor: 25 × 1.466666667
- Calculate: 25 × 1.466666667 = 36.6666667 ft/s
- Result: 25 mi/h = 36.67 ft/s
Example 2: Convert 60 mi/h to ft/s
- Start with the value: 60 mi/h
- Apply the conversion factor: 60 × 1.466666667
- Calculate: 60 × 1.466666667 = 88 ft/s
- Result: 60 mi/h = 88 ft/s
Example 3: Convert 100 ft/s to mi/h
- Start with the value: 100 ft/s
- Apply the conversion factor: 100 × 0.681818182
- Calculate: 100 × 0.681818182 = 68.1818182 mi/h
- Result: 100 ft/s ≈ 68.18 mi/h
Conversion Table
| Miles per Hour (mi/h) | Feet per Second (ft/s) |
|---|---|
| 1 mi/h | 1.47 ft/s |
| 5 mi/h | 7.33 ft/s |
| 10 mi/h | 14.67 ft/s |
| 15 mi/h | 22.00 ft/s |
| 20 mi/h | 29.33 ft/s |
| 25 mi/h | 36.67 ft/s |
| 30 mi/h | 44.00 ft/s |
| 35 mi/h | 51.33 ft/s |
| 40 mi/h | 58.67 ft/s |
| 45 mi/h | 66.00 ft/s |
| 50 mi/h | 73.33 ft/s |
| 55 mi/h | 80.67 ft/s |
| 60 mi/h | 88.00 ft/s |
| 65 mi/h | 95.33 ft/s |
| 70 mi/h | 102.67 ft/s |
| 75 mi/h | 110.00 ft/s |
| 80 mi/h | 117.33 ft/s |
| 90 mi/h | 132.00 ft/s |
| 100 mi/h | 146.67 ft/s |
| 120 mi/h | 176.00 ft/s |
Popular Speed Conversions
About Miles per Hour (mi/h)
Definition
Miles per hour (mph or mi/h) is a unit of speed expressing the number of statute miles traveled in one hour. It is part of the imperial and United States customary systems of measurement.
- 1 mi/h = 1.609344 km/h
- 1 mi/h = 0.44704 m/s
- 1 mi/h = 1.466666667 ft/s
- Symbol: mph, mi/h, or MPH
Common Applications
Miles per hour is primarily used in the United States, United Kingdom, and territories with historical British influence. It measures vehicle speeds, wind speeds, and running or cycling speeds in these regions. Road signs, speedometers, and weather reports commonly display speeds in mi/h.
About Feet per Second (ft/s)
Definition
Feet per second (ft/s, ft/sec, or fps) is a unit of speed expressing the distance in feet traveled in one second. It belongs to the imperial and US customary systems of units.
- 1 ft/s = 0.3048 m/s
- 1 ft/s = 0.681818182 mi/h
- 1 ft/s = 1.09728 km/h
- Symbol: ft/s, ft/sec, or fps
Common Applications
Feet per second is used in engineering, ballistics, and physics calculations where imperial units are preferred. It is particularly common in measuring projectile velocities, fluid flow rates in pipes, and certain sports analytics. While less common than mi/h for everyday speeds, ft/s provides more precision for shorter distances and time intervals.
Related Speed Conversions
Frequently Asked Questions
How many feet per second are in 1 mile per hour?
There are exactly 1.466666667 feet per second in 1 mile per hour. This conversion factor comes from the relationship between miles and feet (1 mile = 5,280 feet) and hours and seconds (1 hour = 3,600 seconds). Therefore, 1 mi/h = 5,280 ft ÷ 3,600 s = 1.466666667 ft/s.
How do I convert 60 mph to feet per second?
To convert 60 mph to feet per second, multiply 60 by 1.466666667. The calculation is: 60 × 1.466666667 = 88 ft/s. This is a commonly referenced conversion since 60 mph is a typical highway speed limit in many countries.
Why use feet per second instead of miles per hour?
Feet per second is often used in technical and scientific applications where smaller time intervals and distances are measured. It provides better precision for calculations involving acceleration, deceleration, and short-duration events. Engineers and physicists frequently use ft/s when working with projectiles, mechanical systems, and fluid dynamics.
What is the conversion factor from mi/h to ft/s?
The conversion factor from miles per hour to feet per second is 1.466666667 (or exactly 22/15). This factor is derived mathematically: since 1 mile equals 5,280 feet and 1 hour equals 3,600 seconds, dividing 5,280 by 3,600 gives 1.466666667.
How fast is 100 mph in feet per second?
100 miles per hour equals 146.67 feet per second. At this speed, an object travels almost 147 feet every second. This conversion is particularly relevant in motorsports and high-speed vehicle testing where both measurements are commonly referenced.
Is feet per second the same as fps in video?
No, fps in video contexts means “frames per second,” which measures how many images are displayed per second in video playback. In speed measurements, fps or ft/s means “feet per second,” a unit of velocity. While they share the same abbreviation, they measure completely different quantities.
What speed is 25 mph in feet per second?
25 miles per hour equals 36.67 feet per second. This speed is typical for residential streets and school zones. Understanding this conversion helps visualize stopping distances and reaction times in driving safety contexts.
Can I convert feet per second back to miles per hour?
Yes, to convert feet per second back to miles per hour, multiply the ft/s value by 0.681818182 (or divide by 1.466666667). For example, 50 ft/s × 0.681818182 = 34.09 mi/h. This reverse conversion is equally important in many engineering and physics applications.