424 knots in miles per hour
Result
The conversion result is: 424 knots is equivalent to 487.930485961982 miles per hour.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 mile per hour is equal to 0.0020494722686336 times 424 knots.
It can also be expressed as: 424 knots is equal to 1 / 0.0020494722686336 miles per hour.
Approximation
An approximate numerical result would be: four hundred and twenty-four knots is about four hundred and eighty-seven point nine three miles per hour, or alternatively, a mile per hour is about zero times four hundred and twenty-four 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.