Nautical miles per day to knots converter above calculates how many knots are in 'X' nautical miles per day (where 'X' is the number of nautical miles per day to convert to knots). In order to convert a value from nautical miles per day to knots (from nmi/d to kn) simply type the number of nmi/d to be converted to kn and then click on the 'convert' button.