40 knots in miles per hour
Conversion
40 knots is equivalent to 46.0311779209417 miles per hour.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 mile per hour is equal to 0.0217244060475162 times 40 knots.
It can also be expressed as: 40 knots is equal to miles per hour.
Approximation
An approximate numerical result would be: forty knots is about forty-six point zero three miles per hour, or alternatively, a mile per hour is about zero point zero two times forty 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.