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Miles Per Hour to Feet Per Second Converter

Instant, two-way conversion across common engineering units.

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1 mph = 1.4666667 ft/s(Miles per hour → Feet per second)

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Converting miles per hour to feet per second

To convert miles per hour to feet per second, multiply the value by 1.4666667. Speed conversions appear in wind loading, air velocity in ducts and transport analysis, where codes mix metric and imperial units.

Miles Per Hour (mph)

Miles per hour (mph) is the road and wind speed unit in the US and UK.

Origin
Derived from the statute mile of 1,609.344 m.
Where it is used
Used for design wind speeds in US codes and for traffic and transport data.
Relation to SI
1 mph = 0.44704 m/s exactly.

Feet Per Second (ft/s)

Feet per second (ft/s) is the imperial speed unit used in engineering.

Origin
Derived from the international foot of 0.3048 m.
Where it is used
Used for air and water velocity in US mechanical and plumbing design.
Relation to SI
1 ft/s = 0.3048 m/s exactly.

Frequently asked questions

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

1 mph equals 1.4666667 ft/s.

How do I convert miles per hour to feet per second?

Multiply the value by 1.4666667. For example, 10 mph equals 14.666667 ft/s.

How do I convert back from feet per second to miles per hour?

1 ft/s equals 0.68181818 mph. The converter above works in both directions, so you can type into either field.

Which speed unit do wind load codes use?

Eurocode and most metric standards state basic wind speed in meters per second, while US standards such as ASCE 7 use miles per hour. Check the averaging period as well as the unit.

What is a knot?

One knot is one nautical mile per hour, about 0.514 m/s. It is standard in marine works, aviation and meteorological data.

Is this speed converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

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