If you didn’t know, Google can do clever unit conversions. Example conversions include: 1 mile in km 4 weeks in days 4.9 lightyears in au You can even use compound units: 55 mph in m/s 20 N/(m^2) in Pascals In fact you can use arbitrary compund units. The silliest I managed to find is: 2 great gross speed of light in bakers dozen furlongs per year A great gross is 12 gross (a gross is 144). A bakers dozen is 13. A furlong is 220 yards. Google, conversions, silly