I love it, everything is there!
You have: kilometers per hour
You want: attoparsecs per microfortnight
* 10.889018 You have: kilometers per hour
You want: attoparsecs per microfortnight
* 10.889018I found myself wanting to calculate Little Boy blast yields sufficiently often that I added a hiroshimabomb unit of energy.
Similarly, various areal units such as countries and states/provinces.
Australian rules football grounds, even at the highest level of the game, have no fixed dimensions. For senior football, the playing field is an oval, typically between 135–185 metres (148–202 yd) long goal-to-goal and 110–155 metres (120–170 yd) wide wing-to-wing. Grounds can vary from long and narrow to almost circular, and are not necessarily symmetrical, depending upon how and where the field was constructed. At least 5 metres (5.5 yd) of space between the boundary line and any fence is required for safety.
https://en.wikipedia.org/wiki/Australian_rules_football_play...
Canadian Football: 150 yards length overall, 65 yards width overall. 2.0144628 acres area, 0.81522418 hectares.
https://sportsknowhow.com/football/field-dimensions/canadian...
The other question is if you're looking for length or areal metrics.