Well maybe we should return to measuring cubits and stadium, because if the ancients did it that way then it certainly positively absolutely unquestionably definitely surely really conservatively correctly is the right way, sarcastically speaking. Really though, the foot unit does go back to ancient times.
One is a very flexible number, one electron, one atom, one molecule, one protein chain, one cell, one person, one city, one country, one continent, one planet, on solar system, one galaxy, one universe… all that flexibility has unfortunately led to lots of creativity, rather than simplicity. Micrometer, millimeter, meter, kilometer, megameter, the SI metric system is so much easier to rescale to larger and smaller sizes.
NIST Metric Program is trying to encourage the metric system here, will the USA really be the very last country to standardize? Surely a mark of distinction, but not a good one.
Metric Week Begins October 9! Let the anthropologists worry about the dated systems, they enjoy that kind of work, really they need something to do, its okay. 
Mriana - 22 August 2012 04:46 PM
Fractions have always been my speciality. In fact, I loved doing fractions in school, but not decimals.
Spoken like a mathematician. But 100 inches / 12 = 8.33… feet is an easier calculation than 348 cm / 100 = 3.48 meters? 1 1/2 liters is 1.5 liters or 1500 milliliters or 1500 cm³, simple.
Just use Google to do your unit conversions by typing any conversion you want, like:
1 US cup in ml
(1 US cup is 236.588 ml)
Waiter, I’ll have 2.47556584 cubed millicubits of tea, please.
We still have time to switch to duodecimal before the metric change, leading the way instead of following! 
In cars some speedometers convert from mi/h to k/h for you.
(Now, you can razzz my math errors, if you can find them.
)