## Conversion formula

The conversion factor from feet per second to meters per second is 0.3048, which means that 1 foot per second is equal to 0.3048 meters per second:

1 ft/s = 0.3048 m/s

To convert 398 feet per second into meters per second we have to multiply 398 by the conversion factor in order to get the velocity amount from feet per second to meters per second. We can also form a simple proportion to calculate the result:

1 ft/s → 0.3048 m/s

398 ft/s → V(m/s)

Solve the above proportion to obtain the velocity V in meters per second:

V(m/s) = 398 ft/s × 0.3048 m/s

V(m/s) = 121.3104 m/s

The final result is:

398 ft/s → 121.3104 m/s

We conclude that 398 feet per second is equivalent to 121.3104 meters per second:

398 feet per second = 121.3104 meters per second

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 meter per second is equal to 0.0082433163191284 × 398 feet per second.

Another way is saying that 398 feet per second is equal to 1 ÷ 0.0082433163191284 meters per second.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred ninety-eight feet per second is approximately one hundred twenty-one point three one meters per second:

398 ft/s ≅ 121.31 m/s

An alternative is also that one meter per second is approximately zero point zero zero eight times three hundred ninety-eight feet per second.

## Conversion table

### feet per second to meters per second chart

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

feet per second (ft/s) meters per second (m/s)
399 feet per second 121.615 meters per second
400 feet per second 121.92 meters per second
401 feet per second 122.225 meters per second
402 feet per second 122.53 meters per second
403 feet per second 122.834 meters per second
404 feet per second 123.139 meters per second
405 feet per second 123.444 meters per second
406 feet per second 123.749 meters per second
407 feet per second 124.054 meters per second
408 feet per second 124.358 meters per second