4 knots in miles per hour
Conversion
4 knots is equivalent to 4.60311779209417 miles per hour.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 mile per hour is equal to 0.217244060475162 times 4 knots.
It can also be expressed as: 4 knots is equal to miles per hour.
Approximation
An approximate numerical result would be: four knots is about four point five nine miles per hour, or alternatively, a mile per hour is about zero point two two times 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.