Quote Originally Posted by slohairt View Post
Also, keep in mind that not every mills' 16 oz. (or 13 oz.) cloth is exactly the same weight. They technically measure their cloth in metric (grams per metre) and then round it to the nearest ounce.
Yeah, that's something that I can't quite understand -- there seem to be two different standards being all mixed up and mashed together here -- metric and imperial. Even in your above statement: "grams per metre" and then rounding it to the nearest "ounce."

I wonder then perhaps whether I should have done my calculations using square metres instead of square yards... It COULD make a difference possibly. A meter and a yard are similar but different. Once you start squaring numbers, it could be quite a lot.

Let's double-check.

154.5"=3.92m
23" = 0.58m

54"= 1.37m (that is if we have a double-width of 54" as opposed to 56" or 60")

So the area of one linear METER of tartan fabric measures: 1.37m^2.

Hence, IF:

1.37m^2 -----> 13 oz
2.27m^2 -----> x oz

x = 21.5 oz. Which is still acceptable, given that my kilt weighed 25 oz.

However, using the original formula in metric (but using grams): 25oz ÷ 2..27m^2 x 1.37 = 15 oz. And there's no way that I have anywhere near that kind of weight... Which makes it more likely that the fabric weight was determined by the yard rather than by the metre, it seems.