Carb grams are weight grams?

John E said:

I wonder if the term "grams" in counting carbs is the same scale
derived from KG used in weighing gold, or potatos, ..etc.

Yes. Exactly the same gram. However, food contains more than just
carbs.

Quoted message said:

A piece of sugar candy that weighs 30 grams on a gold scale does NOT
translate to a much higher carb grams, correct?

Consider "Smarties" candies. A 7g roll of smarties contains between
6g and 7g of carbs and trace amounts of flavorings, binder, etc.

However, a 100g Russet potato only contains about 16g of carbs. The
rest is mostly water. http://www.delorie.com/health/ns/?fid=11353

Quoted message said:

If so, then someone can eat a very small piece of desert to satisfy
some eagerness as long as the total "scale" grams keeps him below
the the ketosis requirement maximum. Correct?

You have to know what percentage of the food's weight is carbs.
Certainly, 20g of food cannot contain more than 20g of carbs, so if
you want to be really conservative you can use that method, but you'd
be taking in less carbs than you think - and IMHO it's better to keep
carbs consistent at a reasonable amount (CCLL for Atkins, for example)
than to keep them randomly lower than that.