[1] https://en.wikipedia.org/wiki/Imperial_and_US_customary_meas...
Oh yes, like one millimile is about five feet long. Very intuitive indeed.
http://rationalwiki.org/wiki/Metric_system
The quote at the very top of the article explains how US system is intuitive compared to metric, even if it was meant as satire.
for example my foot is 25 centiyards.
Eg. For a 1-acre square plot of land, what is the length of its sides in feet?
https://www.infoplease.com/askeds/dimensions-acre
"The acre, by the way, was originally an English unit of measurement that described the area that a yoke of oxen could plow in a day."
Now for the people who know metric it's fairly trivial to calculate how many liters there are in a cubic meter. A liter is defined as being one cubic decimeter. A decimeter being one step down from a meter means for cubic measurements it's a factor 1000. one cubic meter multiplied by a thousand is 1000 cubic decimeters or, equivalently, 1000 liters.
Note how in both examples you start with nice round numbers. I havent cherry picked a starting point that ends up nicely in metric.
In fact I find in practice I hardly ever mention units. Being off by a factor 10 is usually obvious enough that people know what unit you're using.