When communicating in English with the intent to be understood it is wise to include both, putting the conversion in parens. I’m always thankful when Americans include this - otherwise all those feet and pounds and inches and stone are just random numbers to me.
I just remember that 1hp is 754 watts, but lets just call it 750. Another magic conversion that I remember from working on that stuff is that Nm * RPM / 9549 = kW. We never used ft-lbs though.
kW*h is the unit that absolutely kills me. Especially because people will just say "kW". And before long they're talking about "kW*h per day"... Kills me. "What do you people have against James Prescott Joule?!"
The prefixes with Joules get bigger. 1kWh is 3.6MJ. G and T are rare outside data sizes, it's nice if everything can stay in the milli through kilo prefix range.
