Miles per Hour to Feet per Second (mph to ft/s)

1 mile per hour equals 1.466667 feet per second — multiply the number of miles per hour by 1.466667 to convert to feet per second. A mile is 5,280 feet and an hour is 3,600 seconds, so 5,280 ÷ 3,600 = 1.466667. The factor is exact (22/15).

The formula

To convert miles per hour to feet per second, multiply by the exact factor:

ft/s = mph × 1.466667

For example, 60 mph × 1.466667 = 88 ft/s. To reverse it, multiply ft/s by 0.681818 to get mph.

Conversion table

Miles per hour (mph)	Feet per second (ft/s)
1	1.466667
5	7.333333
10	14.666667
20	29.333333
30	44
40	58.666667
50	73.333333
60	88
70	102.666667
100	146.666667

How to convert online

1. Type the number of miles per hour into the first box.
2. Read the feet-per-second value instantly in the second box.
3. Or enter a ft/s value to convert back to mph — it works both ways.

Use the Mile per Hour to Foot per Second Converter — free and instant in your browser.

Where this conversion is used

Miles-per-hour to feet-per-second conversion is common in physics problems, vehicle stopping-distance calculations, sports and ballistics, and traffic engineering, where speeds posted in mph must be turned into feet per second to work with time-and-distance formulas.

Worked example

Suppose a car travels at 45 mph and you want to know how far it moves each second. Apply the formula: 45 × 1.466667 = 66 ft/s, so in one second it covers 66 feet. During a 1.5-second reaction time it would travel 66 × 1.5 = 99 feet before the brakes even engage. Reversing it, 30 ft/s ÷ 1.466667 = 20.45 mph. Because the factor is the exact fraction 22/15, round speeds like 15, 30 and 60 mph convert to clean 22, 44 and 88 ft/s figures.

FAQ

How many feet per second are in a mile per hour?

One mile per hour equals 1.466667 feet per second. Multiply mph by 1.466667 — for example, 10 mph = 14.666667 ft/s.

What is 60 mph in feet per second?

60 mph = 88 ft/s exactly, a common rule of thumb in physics and driving problems.

How do I convert feet per second back to mph?

Multiply ft/s by 0.681818 (or divide by 1.466667). So 88 ft/s = 60 mph.

Related converters

• Foot per Second to Mile per Hour Converter
• Mile per Hour to Meter per Second Converter
• Mile per Hour to Kilometer per Hour Converter
• Mile per Hour to Knot Converter

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