Unit Converter
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 999 feet per second into miles per hour we have to multiply 999 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
999 ft/s → V(mph)
Solve the above proportion to obtain the velocity V in miles per hour:
V(mph) = 999 ft/s × 0.68181818181818 mph
V(mph) = 681.13636363636 mph
The final result is:
999 ft/s → 681.13636363636 mph
We conclude that 999 feet per second is equivalent to 681.13636363636 miles per hour:
999 feet per second = 681.13636363636 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 0.0014681348014681 × 999 feet per second.
Another way is saying that 999 feet per second is equal to 1 ÷ 0.0014681348014681 miles per hour.
Approximate result
For practical purposes we can round our final result to an approximate numerical value. We can say that nine hundred ninety-nine feet per second is approximately six hundred eighty-one point one three six miles per hour:
999 ft/s ≅ 681.136 mph
An alternative is also that one mile per hour is approximately zero point zero zero one times nine hundred ninety-nine 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) |
---|---|
1000 feet per second | 681.818 miles per hour |
1001 feet per second | 682.5 miles per hour |
1002 feet per second | 683.182 miles per hour |
1003 feet per second | 683.864 miles per hour |
1004 feet per second | 684.545 miles per hour |
1005 feet per second | 685.227 miles per hour |
1006 feet per second | 685.909 miles per hour |
1007 feet per second | 686.591 miles per hour |
1008 feet per second | 687.273 miles per hour |
1009 feet per second | 687.955 miles per hour |