When you calculate speed, do you use miles per hour (mph) or feet per second (fps)? It depends on the distance you're traveling, but there will likely be a time when you'll have to switch from fps to mph.

    Fortunately, you can use our easy fps to mph calculator to get easy and effortless conversions between 30 speed and velocity units.

    To know all about fps and mph and how to convert them using an equation, check out the guide below. If you find it useful, please share it with your friends.


    What is fps?

    Fps is a unit of both speed and velocity. It expresses the distance you travel in feet. With this unit of measurement, time is expressed in seconds.

    How often will you use fps? Well, you'll be surprised.

    Since feet don't cover a lot of distance compared to miles, many people don't use this unit of measurement as much. But we're always on the go, whether we're walking or driving. So fps can have a lot of value in our lives.

    Our body's sensory of motion responds to fps. When we travel and our inner-ear senses detect forward motion, our body recognizes fps. This is the reason why we measure fps by time, not just distance.

    Examples Of Fps

    Say you're in a car and count one second, you could easily gain 100 feet distance when you're driving about 70 mph. But, the distance is just as complex if you count one second while traveling by foot.

    If you're running, you can gain 32 feet in distance after a second. While walking, you can gain about 3 feet in a second.

    What is mph?

    Mph is the unit of speed that most Americans know. We measure vehicle speed and distance in mph.

    Mph measures our speed by estimating how many miles we cover in an hour. The measurement starts with one mile and estimates how many more miles you'll cover.

    The higher your mph, the faster you'll go and the more miles you'll cover in an hour. The lower your mph, the slower you'll go and the less distance (miles) you'll cover.

    These numbers assume you're going faster or slower and measures the distance you travel in an hour based on your speed.

    Examples Of Mph

    All American vehicles use mph. Most Americans use mph while driving their car. But you can also use mph when driving a motorcycle, bicycle, or when riding in a train.

    Here are common mph uses:

    • Speed limits
    • Road traffic signs
    • Monitor vehicle speed
    • Gauge ball speed in sporting events, such as tennis and baseball

    History Of Mph

    Mph as a speed measurement dates back to the 18th century. Mph was originally used to determine the speed of motor coaches. The trend continued when trains became the main transportation method.

    Faster speed units were required, and mph was the easiest to translate.

    Why convert fps and mph?

    Now you know a briefing of fps and mph, we can focus on the conversion. But why should we? For one of two reasons:

    • You want to convert distance to speed
    • You want to convert speed to distance

    Here are common reasons why you'll want to convert these measurements:

    Fps to Mph

    Let's say you're riding your bike and are unsure of how fast you're going. But you're able to measure your distance and estimate each second you rode your bike. This can give you a better understanding of your bike speed.


    You measured your bike speed over 30 seconds. Your Apple Watch estimates that you covered 660 feet, which means your speed was 22 feet per second (660 / 30 = 22).

    Plug that into the conversion calculator and you'll know that you reached a speed of 15 miles per hour.

    Mph to Fps

    Let's say you're training for a race. You're measuring your speed in miles or kilometers, but you want to optimize your performance. You're training for a 5k, which is about three miles.

    After estimating an average running speed of 6.22 mph, you want to know how many feet you are covering in a second. You use the conversion calculator and get the number 9.12 fps.

    For reference, top sprinter Usain Bolt can achieve speeds of 34.25 fps.

    How do you convert fps to mph (and vice versa)?

    You can find out the fps to mph conversion by using the conversion calculator or by calculating it yourself.

    Fps to Mph

    One foot per second = 0.681818 miles per hour.


    Let's say your distance is five feet. You can find your total by using this equation:

    5 ft/second = (5 x 0.681818)

    = 3.4 miles per hour.

    Mph to Fps

    One mile per hour = 1.4666667 ft per second


    If your distance is five miles, find your total using the following equation:

    5 miles per hour = (5 x 1.4666667)

    = 7.3 ft/second

    Why use an fps to mph calculator?

    This equation to convert isn't difficult. But why should we use a calculator? There are two main reasons:

    • To guarantee your answer is error-free
    • To say goodbye to pesky equations and hello to effortless conversions

    Not everyone is great at math. Even though is equation is easy, multiplying a simple number by 0.681818 can be challenging. Additionally, it can be tough to remember the equations in the first place.

    Tell your friends about us!