complete.tools

ft/s to mph

Convert feet per second to miles per hour, with km/h, m/s and knots shown alongside.

What this tool does

Convert feet per second to miles per hour, with km/h, m/s and knots shown alongside. Type an amount in feet per second, choose the units, and the tool converts it to miles per hour. It offers 5 speed units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Foot per second, Mile per hour, Kilometer per hour, Meter per second, Knot. Starts as Foot per second.
  • To: Choose one of the same 5 units as "From". Starts as Mile per hour.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from feet per second to miles per hour:

  • 1 ft/s ≈ 0.681818 mph
  • 5 ft/s ≈ 3.409091 mph
  • 10 ft/s ≈ 6.818182 mph
  • 50 ft/s ≈ 34.090909 mph
  • 100 ft/s ≈ 68.181818 mph

Multiply the number of feet per second by about 0.681818 to get miles per hour. The factor follows from exact definitions. It has more digits than fit here, so it is shown rounded.

Sources: Foot per second: exact by definition. Mile per hour: exact by definition.

Limitations

  • Converts speed units only. It does not work out speed from a distance and a time.

FAQs

Q: How do I convert ft/s to mph?
A: Multiply by about 0.681818. For example, 100 ft/s is about 68.1818 mph.
Q: Why is the factor 15/22?
A: A mile is 5,280 feet and an hour is 3,600 seconds, so 1 ft/s is 3,600 / 5,280 = 15/22 mph.
Q: Can I convert the other way, from mph to ft/s?
A: Yes. Choose mph in the From box and ft/s in the To box.

Explore Similar Tools

Explore more tools like this one: