LOL. I have a program called "gonvert" that will convert anything to anything. If you ever wondered about it, the speed of light in knots is 582,749,918.359. To get back to pluto, being 31.963 AU distance, that makes it approximately 1.04584355879e+13 cubits (biblical) away. Put another way, it's 23769171790.6 furlongs, 9.50766871624e+11 rods, 860618565.654 leagues, or 25830384273 stadia (greek).
It can get really interesting when you start to try to convert things like force or power in archaic terms.