Metric vs. other measurement systems - chart

[Toolmaker51]

And it keeps pirates from stealing them, helping to cement America on the Imperial Standards swamp. https://www.npr.org/sections/thetwo-...-metric-system.

Speaking of which I found this amazing graphic today, showing the relationships of liquid measure in the (US) Imperial system. See they're perfectly simple! (just don't do it wrong; I think you'll summon a demon instead of finding how many teaspoons in ⅓ cup :-)

Decent graphic depiction, but siding with Marv on this one, summoning inferial IS demonic...