YouDontHasToCallMeJohnson
forkol
I can pretty much do lb-kg and mi-km conversion back and forth with pretty good accuracy without a calculator.
How are you with cubits to centimeters?
Furloughs? Leagues?
Short and long tons?
Knots?
Also, don't forget minim, fluid dram, shot, gill, barrel and hogshead.
Paul P
Bristol_Jonesey
The one redeeming feature of the Imperail System was that using a base of 12, there were so many integer divisors (1, 2, 3, 4, 6) compared to metric (1, 2, 5)
As an ex-woodworker (for now) I appreciate inches being divisible into halfs, quarters, eighths, sixteenths, etc. Easy to find the centers of things and do simple calculations. I tried going metric but it's really weird in this context. Whoever invented the metric system wasn't a woodworker.
That is because in the metric system you don't typically write fractions as 1/2, 1/4 etc, but as decimal fractions like 0.5, 0.25 etc. So woodworkers that use the metric system will simply use decimal fractions of m, cm and mm.
Having been taught the metric system in school, going to the US system is an example of how something would
not be designed if it was done today. Why exactly is 1 mile equal to 5280 ft? How do you convert from one to the other (say if you had no calculator)?