638 knots in miles per hour
Result
The conversion result is: 638 knots is equivalent to 734.19728783902 miles per hour.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 mile per hour is equal to 0.001362031727117 times 638 knots.
It can also be expressed as: 638 knots is equal to 1 / 0.001362031727117 miles per hour.
Approximation
An approximate numerical result would be: six hundred and thirty-eight knots is about seven hundred and thirty-four point two zero miles per hour, or alternatively, a mile per hour is about zero times six hundred and thirty-eight knots.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.