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Journal Iamthefallen's Journal: Metric lack of precision 16

It's OK to not be precise, I promise, I grew up with Metric, I'll vouch for you. You really can say that a building is "oooh, I dunno, 30 or 40 meters tall".

It's OK, calm down, no-one is going to make you give accurate and precise numbers down to the smallest decimal should you ever have to use Metric.

You don't have to explicitly ask for 473.18ml of beer rather than a pint. Just ask for a beer, the bartender will handle it, it's not a big deal.

When baking, you don't have to actually measure 387 grams of flours for 3 cups, just change the proportions and wing it. 7 deciliters should about do it, add some more if needed.

But what of my woodworking tools, what about the 2x4? Good god what the hell is a 2x4 in Metric?!

Calm down, calm down, for trade-specific areas we use inches or whatever other unit as well! Studs are still often called 2x4, boats and planes travel in knots, day trips can still be expressed as "about 2 hours away", and a 38 inch rack on a 24 inch frame can be expressed as "Holy shit look at those boobs!".

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Metric lack of precision

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  • Saying (as a teacher in my US High School did) that you are 18 dm tall is idiotic.
    • Hell, don't use decimeters at all. I'd say don't use centimetres, either. Powers of three is where it's at. It's either in millimetres or metres. There's little point in using anything in between...
      • by Mantorp ( 142371 ) *
        no no no, you can't say guesstimate something about a foot long to be 300 mm, that's just wrong
        • by Tet ( 2721 )
          you can't say guesstimate something about a foot long to be 300 mm, that's just wrong

          It is? Oh... it seems to work OK for me! Would saying 0.3m be any better?

  • Um, carpentery and wood working are two areas I don't think I'll everyuse metric. Being divisible by three is too powerful a tool to lose. My only real complaint is that inches are done in 16ths instead of 12ths.

    As far as beer is concerned, I'd pretty sure anyone who likes it would rally around the idea that it should come in liters instead of pints.
    • I've complain about this before, and I'm sure it's simple for native USians, but let me give an example:

      You need to drill a hole. The 1/2 inch bit is too small, so you need to find one just slightly bigger, which one do you get?
      33/64, 7/16, 3/8, 31/64, 5/8, 17/32, 9/16, 15/32

      Hmm, let's see, one inch divided by 64 times 33 is bigger than one inch divided by...

      Meanwhile, in my box in Ye Olde country, when I see that the 12mm drill is to small, I reach for the 13mm, or the 14mm :)

      But yes, woodworkers still do
      • by FroMan ( 111520 )
        Ha! Trick question. You reach for the trusty sand paper and make whatever you are sticking in the hole a little skinnier, or you reach for a bigger mallet.

        But really, in that case, if you are really looking at 1/64 or 1/32 of an inch, adding a full mm is going to be overkill.
        • Ah, but part of the trick is knowing what level of increment is the appropriate one! Is an increase from 1/2" to 9/16" more or less than a mm? How about 1/2" to 17/32"?

          Of course it is a trick question, the answer is to use the 1/2" bit again, but this time tilt and swivel the drill around the hole :)

      • Imperial measurements used to drive me crazy - until I started to do construction; specifically, blacksmithing.

        Decimal-based systems are great with precision instruments and machines that hold very tight tolerances - like lathes and mills. When you can work in 0.001 inch increments, then it makes sense to use a decimal system.

        But as soon as you work with methods that aren't so precise, with measurement tools that are not so finely grained, the Imperial fractional scale makes more sense.

        It's all powers of tw
    • That, and a 2x4 isn't really 2 inches by 4 inches...
      But yeah, easily divisible by three makes things easier.
      • by FroMan ( 111520 )
        Throw some drywall on those 2x4s. Measure again.

        You will also find that 8ft 2x4s are not really 8ft too. But they should be the right length to use in a studwall for the right height without cutting.

        You will also find in hardwoods that a 1" is actually 13/16ths too to allow for sanding instead of being an actual 3/4". What?!? 1" is the rough sawn, 13/16" is the planed, 3/4" is the finished board.

        Some of the things in carpentry and woodworking make sense only when you actually do the work, and to someone
  • by Otter ( 3800 ) on Monday January 15, 2007 @10:48AM (#17613358) Journal
    One problem in the US was that under Jimmy Carter's metrification push, highway signs were reworked with things like "Cleveland: 33 miles (53.108 km)" that convinced people that the metric system was really, really complicated.
    • You often see this in the news as well: "The plane crashed about 5 miles (8.04672km) from shore".

      Oh, and for cooking, we still use tbsp, tsp, a fist, a pinch, a drop, and a splash.

      Ballpark estimates are OK in Metric. Using Metric doesn't mean you have to become a mathematician, it's so easy that 95% of the worlds population (6,230,946.374 people) use it!
    • by nizo ( 81281 ) *
      Ahh; so if they had been clever they would have put stuff like "53 km (32.932 miles)" on the signs instead. Stupid gits.
  • The Potrzebie system of weights and measures [answers.com] is the one true system. Anything else is an approximation.
  • It has to be said: [execulink.com]

    Six, six is 12, 30 is 42 beers. 42 metric beers.

    That's good for me, eh.

    Cheers,

    Ethelred "How come he's not wearing a toque?" McUnraed

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