Accurately convert miles per hour (mph) to feet per second (ft/s) with our easy-to-use calculator. Perfect for students, engineers, pilots, and anyone working with speed measurements.
Conversion Formula:
Feet per second = Miles per hour × 5280 ÷ 3600
Simplified: Feet per second = Miles per hour × 1.4667
Based on 1 mile = 5280 feet and 1 hour = 3600 seconds
Enter any non-negative speed value
Precision:
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Help others convert speed units accurately. This tool is especially useful for students, engineers, and anyone working with speed measurements.
Understanding the conversion process helps you verify results and perform calculations manually when needed
To convert between miles per hour and feet per second, we need two key conversion factors:
1 mile = 5280 feet
This converts distance from miles to feet
1 hour = 3600 seconds
This converts time from hours to seconds
The formula to convert miles per hour to feet per second is:
Feet per second = MPH × 5280 ÷ 3600
This formula works because:
For quicker calculations, you can use the simplified version:
Feet per second = MPH × 1.4667
This comes from dividing 5280 by 3600, which equals approximately 1.4667.
Example: Converting 60 mph to ft/s
Using the simplified formula: 60 × 1.4667 = 88.002 ft/s (approximately 88 ft/s)
This is a well-known conversion where 60 mph equals exactly 88 ft/s
Quick reference table for popular speed measurements converted from miles per hour to feet per second
| Miles per Hour (mph) | ≈ | Feet per Second (ft/s) | Typical Scenario |
|---|---|---|---|
| 1 mph | ≈ | 1.47 ft/s | Slow walking speed |
| 3 mph | ≈ | 4.40 ft/s | Brisk walking |
| 5 mph | ≈ | 7.33 ft/s | Jogging pace |
| 10 mph | ≈ | 14.67 ft/s | Running speed |
| 20 mph | ≈ | 29.33 ft/s | School zone speed |
| 30 mph | ≈ | 44.00 ft/s | Residential streets |
| 55 mph | ≈ | 80.67 ft/s | Rural highways |
| 60 mph | ≈ | 88.00 ft/s | Interstate highways |
| 70 mph | ≈ | 102.67 ft/s | Highway speed |
| 100 mph | ≈ | 146.67 ft/s | Race car speed |
All conversions are rounded to two decimal places for simplicity. For precise calculations, use our converter tool above.
Answers to common questions about converting miles per hour to feet per second
Miles per hour (mph) measures distance traveled in miles over one hour, while feet per second (ft/s) measures distance traveled in feet over one second. MPH is commonly used for vehicle speeds in the United States, while ft/s is more useful for scientific calculations and measuring shorter distances.
Converting mph to ft/s is useful in various fields including physics, engineering, aviation, and sports. It helps in understanding speed over shorter distances, calculating stopping distances, determining reaction times, and solving scientific problems that require consistent units.
The simplified factor of 1.4667 is a rounded version of the exact value (5280/3600 = 1.466666...). For most practical purposes, this level of precision is sufficient. For scientific or engineering applications requiring high accuracy, use the full formula: ft/s = mph × 5280 ÷ 3600.
To convert feet per second back to miles per hour, use the inverse formula:
MPH = ft/s × 3600 ÷ 5280
This can be simplified to: MPH = ft/s × 0.6818
Using the exact conversion formula: 60 × 5280 ÷ 3600 = 88. This clean conversion happens because 5280 (feet in a mile) is a multiple of 88 (5280 ÷ 60 = 88), making the math work out to a whole number. This is a useful reference point for verifying conversions.
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