Key Conversion Fact: 1 ft/s = 0.681818 mph | Use formula: mph = ft/s × 3600/5280 | Common reference: 88 ft/s = 60 mph (highway speed)
Convert between feet per second and miles per hour with adjustable precision—perfect for any speed measurement need
Result Precision:
Enter speed in feet per second (try 88 for a common highway speed reference)
Conversion Formula: mph = ft/s × 0.6818181818
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Convert ft/s to miles per hour instantly with precision. Perfect for students, drivers, engineers, and sports enthusiasts needing reliable speed unit conversions—100% free, no registration required.
Enter a value (e.g., 88 ft/s)
Click "Convert" to get results instantly
Copy results or steps with one click
Share conversions with classmates or colleagues
Common ft/s to mph values for instant reference—click any button to auto-fill and convert
Detailed speed conversion chart with common values and real-world applications
| Feet per Second (ft/s) | ≈ | Miles per Hour (mph) | Common Use Case |
|---|---|---|---|
| 1 ft/s | ≈ | 0.68 mph | Slow walking speed |
| 5 ft/s | ≈ | 3.41 mph | Brisk walking speed |
| 10 ft/s | ≈ | 6.82 mph | Jogging speed |
| 20 ft/s | ≈ | 13.64 mph | Cycling speed (leisure) |
| 30 ft/s | ≈ | 20.45 mph | Residential street speed limit |
| 50 ft/s | ≈ | 34.09 mph | Urban road speed limit |
| 88 ft/s | ≈ | 60.00 mph | Highway speed limit (US) |
| 100 ft/s | ≈ | 68.18 mph | Rural highway speed |
| 150 ft/s | ≈ | 102.27 mph | Race car speed (low) |
| 300 ft/s | ≈ | 204.55 mph | High-speed train |
Enter a speed value in feet per second (ft/s) into the input field. You can use whole numbers (e.g., 88) or decimals (e.g., 10.5).
Select your desired result precision using the decimal selector (0-6 decimal places). 2 decimals is recommended for most everyday uses.
Click the "Convert" button to calculate the equivalent speed in miles per hour (mph). Results appear instantly in the output field.
Use the "Copy Result" button to save the converted value to your clipboard, or "Copy Steps" to save the full calculation breakdown.
To convert mph back to ft/s, click the "Swap Units" button. The tool will update all labels, formulas, and quick conversion buttons automatically.
To convert ft/s to mph manually:
1. Multiply the ft/s value by 3600 (seconds in an hour):
ft/hour = ft/s × 3600
2. Divide by 5280 (feet in a mile):
mph = ft/hour ÷ 5280
3. Combined formula:
mph = ft/s × (3600/5280) = ft/s × 0.681818
Convert 88 ft/s to mph:
Step 1: 88 ft/s × 3600 = 316,800 ft/hour
Step 2: 316,800 ÷ 5280 = 60 mph
Result: 88 ft/s = 60 mph
This example shows why 88 ft/s equals exactly 60 mph—a common reference in physics problems and pop culture.
Feet per second (ft/s) measures speed in feet traveled per second, while miles per hour (mph) measures speed in miles traveled per hour. Ft/s is commonly used in physics, engineering, and scientific calculations, while mph is the standard unit for vehicle speeds in the United States and a few other countries.
88 ft/s equals 60 mph because of the mathematical relationship between feet, miles, seconds, and hours: 88 feet/second × 3600 seconds = 316,800 feet/hour. Dividing by 5280 feet (the number of feet in one mile) gives 316,800 ÷ 5280 = 60 miles/hour. This precise conversion has made it a popular reference in physics education and pop culture (e.g., the "Back to the Future" films).
Common scenarios include: completing physics homework problems involving velocity, interpreting radar speed measurements (which often use ft/s), converting athlete speeds (e.g., runners, cyclists) for better understanding, engineering applications (designing machinery or vehicles), aviation calculations (converting airspeed indicators), and construction (understanding equipment operation speeds).
This converter uses the exact mathematical conversion factor (3600/5280 = 0.6818181818...) for calculations. It supports up to 6 decimal places of precision, making it suitable for academic, professional, and personal use. The results are verified against international standard unit conversion references, ensuring accuracy for even technical applications.
Yes! Simply click the "Swap Units" button to switch the conversion direction to mph → ft/s. The formula for converting miles per hour to feet per second is: ft/s = mph × (5280/3600) = mph × 1.4666666667. The tool automatically updates all labels, formulas, quick conversion buttons, and examples when swapping units.
Your conversion history is stored locally on your device using the browser's localStorage feature. It is never transmitted to any servers or shared with third parties. This means your history will persist between sessions on the same device and browser, but won't be accessible from other devices or browsers. You can clear your history by clearing your browser's local storage for this site.
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