Pretty easy really. 1 nm= about 1.1 mile, so speed in mph = 1.1 speed in
knots.

1.15 and a bunch of other decimal places, but who cares? When we sail, we sail
for about two hours. 25 minutes to the dock, about 30 minutes to set up, 2
hours sailing, 30 minutes to take down and 25 minutes home. We flake the sail,
and wash the boat the next day. We don't get burned out and we don't get
frustrated. And we don't pretend to be sailors. We are sailors. Bottom line.