Do Americans actually use the term "imperial" - I'd assumed, as someone from the UK, that this usage was only common in UK and what's now the Commonwealth.
Yep, we call it imperial. Also, mixing imperial and metric is really quite odd. I am not familiar with someone doing it on purpose and would distrust any mixed statement, suspecting that the units may be mislabeled.
Are they the same though.
There are differences between english and American pints, for example.
Also it means nothing to me when someone quotes their weight in lbs or kgs. I need stones to get an impression of how heavy they are.
Where I live it's currently a mish mash of metric and imperial units but the trend is definitely towards metric.
I don't think my kids think in imperial the way i do a lot of the time. Meanwhile metric means absolutely nothing to my dad.
Where I grew up in the urban Midwest, they were called English units (despite everyone knowing that England is metric). Kind of reminded me how the French call French horns English horns.
The UK isn't fully metric - road signs are in miles and car speeds (and speed limits) are in mph. Similarly most people use feet for height and stones for weight of people although anything "official" will be metric.
Choice of units can cause confusion within households - my teenage son sets out bathroom scales to stones and pounds to try and see if he is adding weight and I set it to kg to see if I have lost weight!
I live in Canada very close to a border with Alaska where many cruise-ship tourists cross over on enormous buses when they don't actually have to see the border guard. Often they are unaware they are in an entirely separate country.
When we mention degrees or kilometers, the response is often "What's that in 'normal'?"
Also, these people become extremely confused when told the price of something in "dollars" that are not the dollars they are used to.
NB Not being snarky - just wanted to know! :-)