Metric vs. other measurement systems - chart

[Toolmaker51]

1/10th scales are rare in one way, at say the local hardware, with all graduated fractional or metric. As mwmkravchenko states, and bruce.desertrat observe, they are not extinct. Surveyors and various engineers use them. I have a little 33-272 Stanley graduated in tenths and narrow. Ideal for checks inside tube or through the chuck on barstock in the lathe, handy facing off by relating directly to graduations on the machine. Or buy a loooooong hook rule at 5x the price......maybe 7x
The really small 10 footers, 1/4" wide tapes, in 1/16th's and mm are worth scrounging for. Some converting is needed, but the graduations aren't so fine to make correct measurements difficult. It's additionally helpful fractions and metric divisions don't coincide, pick closest at each instance. Using a straight edge [ie 6" scale] makes an ideal 'pointer' across end of the work, like when threads or chamfers interrupt that plane.
A casual representation of items mentioned;


And speaking of cloth tapes, get one. They are commonly sold among notions for seamstresses; 6'-8' long, dual graduations, unbeatable when measuring circumferences and arcs, in box maybe not a roll-up case, and not expensive.

[Jon]

Another social distancing gem, requiring 17 of the chosen unit to comprise two meters.

[marksbug]

oh I sea...and I was thinking about the 2 harbinger of fright $3.00 meters....

[marksbug]

Im pretty good at all of it, but the celseaus and the bars just dont work so well for me...keylows sometimes work as well as my spelling. I used to know the metrick speedos vs mph pretty good after growing up in japan but....that was long ago and seems to of faded away. the liters...2 liter is a diet soda. do they make metrick messuring cups?? and if they do what are they called ??or are cups already metrick?

[Toolmaker51]

Yes, measuring vessels are available in metric divisions. Labware is pretty much exclusive to it, cookware is dual marked, as are other items. Seems to depend on the end-user market.

[marksbug]

what about time...is there a metrick time that I have missed nano hours? nano happy hours!!! sorry you missed it!!

[bruce.desertrat]

what about time...is there a metrick time that I have missed nano hours? nano happy hours!!! sorry you missed it!!

There is Decimal Time https://en.wikipedia.org/wiki/Decimal_time but metric time is actually a thing; but it's essentially just counting seconds and adding milli, deci, kilo- etc to the front to mean 0.001, 10, 1000 seconds, etc. It's most widely used in computing; on unix systems time is given as the number of seconds since Jan 1, 1970. That lead to the Y2038 problem where Time would stop and start over in 2038 because the 32-bit unsigned integer would roll back over to 0, kind of like the Mayan Calendar in 2012 (which was never *actually* 'the end of the world' to the mayans, but 'time to carve a new calendar!'). Fortunately we use a 64-bit integer, which put off solving the problem until later...MUCH later:

"At 15:30:08 UTC on Sunday, 4 December 292277026596, 64-bit versions of the Unix time stamp cease to work, as it will overflow the largest value that can be held in a signed 64-bit number. This is nearly 22 times the estimated current age of the universe, which is 1.37×1010 years (13.7 billion)."

Now THAT'S how you kick the can down the road...

[hemmjo]

OK, so which came first, the cup, or the cup?

https://www.merriam-webster.com/dictionary/cup

[marksbug]

the a cup, the b cup, the c cup ,the tea cup.the hiccup.the sippy cup....then came the winston cup, the riders cup....there will never be a end to the cups.

[jimfols]

The America's Cup starts Thursday.