## 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 311 feet per second into miles per hour we have to multiply 311 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

311 ft/s → V(mph)

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

V(mph) = 311 ft/s × 0.68181818181818 mph

V(mph) = 212.04545454545 mph

The final result is:

311 ft/s → 212.04545454545 mph

We conclude that 311 feet per second is equivalent to 212.04545454545 miles per hour:

311 feet per second = 212.04545454545 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 0.0047159699892819 × 311 feet per second.

Another way is saying that 311 feet per second is equal to 1 ÷ 0.0047159699892819 miles per hour.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred eleven feet per second is approximately two hundred twelve point zero four five miles per hour:

311 ft/s ≅ 212.045 mph

An alternative is also that one mile per hour is approximately zero point zero zero five times three hundred eleven 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

feet per second (ft/s) miles per hour (mph)
312 feet per second 212.727 miles per hour
313 feet per second 213.409 miles per hour
314 feet per second 214.091 miles per hour
315 feet per second 214.773 miles per hour
316 feet per second 215.455 miles per hour
317 feet per second 216.136 miles per hour
318 feet per second 216.818 miles per hour
319 feet per second 217.5 miles per hour
320 feet per second 218.182 miles per hour
321 feet per second 218.864 miles per hour