Conversion formula

The conversion factor from feet per second to miles per hour is 0.68181818181818, which means that 1 foot per second is equal to 0.68181818181818 miles per hour:

1 ft/s = 0.68181818181818 mph

To convert 3870 feet per second into miles per hour we have to multiply 3870 by the conversion factor in order to get the velocity amount from feet per second to miles per hour. We can also form a simple proportion to calculate the result:

1 ft/s → 0.68181818181818 mph

3870 ft/s → V_(mph)

Solve the above proportion to obtain the velocity V in miles per hour:

V_(mph) = 3870 ft/s × 0.68181818181818 mph

V_(mph) = 2638.6363636364 mph

The final result is:

3870 ft/s → 2638.6363636364 mph

We conclude that 3870 feet per second is equivalent to 2638.6363636364 miles per hour:

3870 feet per second = 2638.6363636364 miles per hour

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 mile per hour is equal to 0.00037898363479759 × 3870 feet per second.

Another way is saying that 3870 feet per second is equal to 1 ÷ 0.00037898363479759 miles per hour.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three thousand eight hundred seventy feet per second is approximately two thousand six hundred thirty-eight point six three six miles per hour:

3870 ft/s ≅ 2638.636 mph

An alternative is also that one mile per hour is approximately zero times three thousand eight hundred seventy feet per second.

Conversion table

feet per second to miles per hour chart

For quick reference purposes, below is the conversion table you can use to convert from feet per second to miles per hour