• bloodfart@lemmy.ml
    link
    fedilink
    arrow-up
    1
    ·
    7 months ago

    well, it’s 3.16 mm, not 31.6, but i get your meaning.

    in that case if you wanted to be real precise, you’d measure from the left or right side of one graduation to the same side of the next graduation. using that technique a person could get a better 1/8" off a ruler than someone eyeballing fractional mms would.

    I still don’t see how a calculator helps though.

    • rutellthesinful@kbin.social
      link
      fedilink
      arrow-up
      1
      ·
      7 months ago

      well yeah, because 1/8" is 3.175mm

      1/3 of a mm is a distance between 1/64" and 1/128"

      mechanical pencil lead is only about 0.4mm

      I still don’t see how a calculator helps though.

      don’t ask me ask the person who posed the “what’s a third of 9.5mm” question

      • bloodfart@lemmy.ml
        link
        fedilink
        arrow-up
        1
        ·
        7 months ago

        Usually when I’m making a precise line, I’ll put an edge on the pencil lead so it will make a mark thinner than its diameter.

        I seem to remember you as the one who brought up calculators, but I’m open to being mistaken.

        • rutellthesinful@kbin.social
          link
          fedilink
          arrow-up
          1
          ·
          7 months ago

          even if you’re in a situation where it’s somehow possible to manually draw 1/3 of a mm to any accuracy, 1/3 scale draft rulers still exist for metric, so it’s equivalent

          I seem to remember you as the one who brought up calculators

          because as soon as you have access to a calculator, “off the top of your head” is an irrelevance