MPH to Feet per Second Converter

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

mph

Enter any non-negative speed value

ft/s

Precision:

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How to Convert MPH to Feet per Second

Understanding the conversion process helps you verify results and perform calculations manually when needed

1 Understand the Conversion Factors

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

2 Apply the Conversion Formula

The formula to convert miles per hour to feet per second is:

Feet per second = MPH × 5280 ÷ 3600

This formula works because:

  • We multiply by 5280 to convert miles to feet
  • We divide by 3600 to convert hours to seconds
  • The result shows how many feet are traveled in one second

3 Use the Simplified Formula

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

Common MPH to Ft/s Conversions

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.

Frequently Asked Questions

Answers to common questions about converting miles per hour to feet per second

What is the difference between mph and ft/s?

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.

Why would I need to convert mph to ft/s?

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.

How accurate is the simplified conversion factor of 1.4667?

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.

How do I convert ft/s back to mph?

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

Why is 60 mph equal to exactly 88 ft/s?

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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