BYTETOOLS

Feet per Second to mph (ft/s to mph) Converter

1 foot per second equals 0.68181818 miles per hour — multiply feet per second by 0.68181818 to convert. There are 5,280 feet in a mile and 3,600 seconds in an hour, so 3600 ÷ 5280 = 0.68181818 mph per ft/s. A quick rule of thumb: multiply ft/s by roughly two-thirds.

The formula

To convert feet per second to miles per hour, multiply by 0.68181818:

mph = ft/s × 0.68181818
Example: 10 × 0.68181818 = 6.818182 mph

To reverse it, divide mph by 0.68181818 (or multiply by 1.466667) to get ft/s.

Conversion table

Feet per second (ft/s)Miles per hour (mph)
10.68181818
21.36363636
32.04545454
53.4090909
106.8181818
2517.045455
5034.090909
10068.181818
500340.90909
1000681.81818

How to convert online

  1. Type the speed in feet per second into the first box.
  2. Read the mph value instantly in the second box.
  3. Or enter an mph value to convert back to ft/s — it works both ways.

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

Where this conversion is used

Feet per second is the natural unit in US physics, ballistics and sports tracking (throw and pitch speeds), while miles per hour is the everyday US road-speed unit. Converting ft/s to mph makes measured or calculated speeds easy to relate to familiar driving and running figures.

FAQ

How many mph are in a foot per second?

One foot per second equals 0.68181818 mph. Multiply ft/s by 0.68181818 — for example, 10 ft/s = 6.818182 mph.

What is the formula to convert ft/s to mph?

mph = ft/s × 0.68181818, from 3600 seconds ÷ 5280 feet.

How do I convert mph back to ft/s?

Divide by 0.68181818, or multiply by 1.466667. For example, 60 mph × 1.466667 = 88 ft/s.

Is the conversion exact?

Yes. It uses exact definitions (5,280 ft/mile, 3,600 s/hour); 0.68181818 is the repeating-decimal form of 15/22.

Related converters

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