Convert Miles per Hour to Feet per Second
Miles per hour to feet per second is the conversion drivers, engineers, and physics students reach for when a speed needs to work in feet instead of miles. One mph is about 1.466667 feet per second, so the number always gets bigger when you switch from mph to ft/s.
Miles per hour to Feet per second conversion table
| Miles per hour (mph) | Feet per second (ft/s) |
|---|---|
| 1 | 1.466667 |
| 2 | 2.933333 |
| 3 | 4.4 |
| 5 | 7.333333 |
| 10 | 14.666667 |
| 20 | 29.333333 |
| 50 | 73.333333 |
| 100 | 146.666667 |
| 500 | 733.333333 |
| 1,000 | 1,466.666667 |
The formula
To convert miles per hour to feet per second, multiply the speed in mph by 1.466667:
feet per second = miles per hour × 1.466667
A worked example
The cleanest way to see this conversion is the classic driving identity: 60 mph is exactly 88 ft/s.
60 × 1.466667 = 88 ft/s
That exact match is why "60 mph = 88 ft/s" shows up so often in physics and driver's-ed classes — it's a simple, memorable checkpoint for the whole conversion.
Why it's an approximation
One mile per hour equals exactly 22/15 feet per second, a fixed fraction that comes from dividing 5280 feet (one mile) by 3600 seconds (one hour). As a decimal, 22/15 repeats forever (1.4666...), so 1.466667 is that exact fraction rounded to six decimal places. The one case where the rounding disappears entirely is 60 mph, since 60 × 22/15 lands on the whole number 88 with no remainder.
When you'll use it
Working physics problems involving feet, checking stopping distances and reaction-time calculations on US roads, and converting pitch, ball, or wind speeds for sports analysis that uses feet per second.
Frequently asked questions
How many feet per second are in a mile per hour?
About 1.466667 feet per second. It's a precise, repeating decimal (it equals the fraction 22/15), so it isn't a whole, clean number even though it's easy to work with.
Is the mph to ft/s conversion exact?
The relationship is fixed and known exactly as a fraction (22/15), but written as a decimal it repeats forever, so 1.466667 is that fraction rounded. One handy exact case is 60 mph, which equals precisely 88 ft/s — a classic identity used in physics classes.
What's a quick way to estimate mph to ft/s in my head?
Multiply the mph value by about 1.5. A 60 mph car is close to 88 ft/s (in fact, exactly 88); a 90 mph pitch is close to 132 ft/s. For anything that matters, use the factor above.